Algebra Made Easy: The Best Student-Friendly Guide

Algebra doesn't have to be tricky! This beginner-friendly guide explains key concepts like pronumerals, variables, expressions, and the properties of arithmetic. Perfect for NSW students starting algebra. With clear examples and practice questions, you'll gain the confidence to write and solve algebraic expressions—just like that!
Algebra Basics for NSW Students Pronumerals, Expressions & Simplifying Terms

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Interactive maths practice

Algebra Practice Test

Build confidence one level at a time. Start with basic linear equations, then progress through fractions, cross multiplication, variables on both sides, brackets and challenging algebra word problems.

  • 8 progressive levels
  • 50 practice questions
  • Instant answer checks
  • Hints and full working
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Level 1 Basic Linear Equations Practice 10 questions · Foundation 0/10

Tip: Type the value of x only. Example: if x = 8, type 8.
  1. x + 7 = 15

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    x = 15 − 7 = 8
    Answer: x = 8
  2. x − 9 = 4

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    x = 4 + 9 = 13
    Answer: x = 13
  3. 3x = 18

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    x = 18 ÷ 3 = 6
    Answer: x = 6
  4. x / 5 = 6

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    x = 6 × 5 = 30
    Answer: x = 30
  5. 2x + 3 = 11

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    2x = 11 − 3 = 8
    x = 8 ÷ 2 = 4
    Answer: x = 4
  6. 4x − 5 = 19

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    4x = 19 + 5 = 24
    x = 24 ÷ 4 = 6
    Answer: x = 6
  7. 5 + 3x = 20

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    3x = 20 − 5 = 15
    x = 15 ÷ 3 = 5
    Answer: x = 5
  8. x / 4 + 2 = 7

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    x / 4 = 7 − 2 = 5
    x = 5 × 4 = 20
    Answer: x = 20
  9. 6x + 4 = 40

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    6x = 40 − 4 = 36
    x = 36 ÷ 6 = 6
    Answer: x = 6
  10. 9x − 8 = 55

    View hint and full working

    Hint: Use inverse operations to isolate x.

    Working
    9x = 55 + 8 = 63
    x = 63 ÷ 9 = 7
    Answer: x = 7

Level 2 Fraction Equations and Cross Multiplication Practice 10 questions · Core skills 0/10

Tip: For fractions, type answers like 5/2 or 1.5. Both are accepted where included.
  1. x / 3 = 8 / 4

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    x / 3 = 2
    x = 2 × 3 = 6
    Answer: x = 6
  2. x / 5 = 9 / 3

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    x / 5 = 3
    x = 3 × 5 = 15
    Answer: x = 15
  3. 2 / x = 1 / 4

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    2 / x = 1 / 4
    Cross multiply: 2 × 4 = x
    x = 8
    Answer: x = 8
  4. 3 / x = 6 / 8

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    3 / x = 6 / 8
    Cross multiply: 3 × 8 = 6x
    24 = 6x
    x = 4
    Answer: x = 4
  5. x / 7 = 5 / 14

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    Cross multiply: 14x = 7 × 5
    14x = 35
    x = 35/14 = 5/2
    Answer: x = 5/2 (2.5)
  6. 4 / x = 2 / 5

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    Cross multiply: 4 × 5 = 2x
    20 = 2x
    x = 10
    Answer: x = 10
  7. (x + 2) / 3 = 6 / 9

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    6/9 = 2/3
    (x + 2)/3 = 2/3
    x + 2 = 2
    x = 0
    Answer: x = 0
  8. (x − 1) / 4 = 5 / 8

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    Cross multiply: 8(x − 1) = 20
    x − 1 = 20/8 = 5/2
    x = 7/2
    Answer: x = 7/2 (3.5)
  9. 2x / 5 = 6 / 10

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    6/10 = 3/5
    2x/5 = 3/5
    2x = 3
    x = 3/2
    Answer: x = 3/2 (1.5)
  10. 3x / 4 = 9 / 2

    View hint and full working

    Hint: Simplify first where possible, then cross multiply carefully.

    Working
    Cross multiply: 2(3x) = 4 × 9
    6x = 36
    x = 6
    Answer: x = 6

Level 3 Multi-Step Linear Equations Practice 5 questions · Core skills 0/5

Tip: Move x terms to one side and number terms to the other side.
  1. 3x + 7 = 2x + 15

    View hint and full working

    Hint: Collect the x terms on one side and the number terms on the other.

    Working
    3x − 2x = 15 − 7
    x = 8
    Answer: x = 8
  2. 5x − 9 = 3x + 7

    View hint and full working

    Hint: Collect the x terms on one side and the number terms on the other.

    Working
    5x − 3x = 7 + 9
    2x = 16
    x = 8
    Answer: x = 8
  3. 4x + 6 = 2x + 18

    View hint and full working

    Hint: Collect the x terms on one side and the number terms on the other.

    Working
    4x − 2x = 18 − 6
    2x = 12
    x = 6
    Answer: x = 6
  4. 7x − 5 = 4x + 16

    View hint and full working

    Hint: Collect the x terms on one side and the number terms on the other.

    Working
    7x − 4x = 16 + 5
    3x = 21
    x = 7
    Answer: x = 7
  5. 6x + 8 = 3x + 26

    View hint and full working

    Hint: Collect the x terms on one side and the number terms on the other.

    Working
    6x − 3x = 26 − 8
    3x = 18
    x = 6
    Answer: x = 6

Level 4 Algebra Word Problems Practice 5 questions · Applications 0/5

Tip: Convert the words into an equation first, then solve for the number.
  1. A number increased by 8 equals 23. Find the number.

    View hint and full working

    Hint: Let the unknown number be x, form an equation, and then solve it.

    Working
    Let the number be x.
    x + 8 = 23
    x = 15
    Answer: x = 15
  2. Three times a number minus 5 is 16. Find the number.

    View hint and full working

    Hint: Let the unknown number be x, form an equation, and then solve it.

    Working
    Let the number be x.
    3x − 5 = 16
    3x = 21
    x = 7
    Answer: x = 7
  3. The sum of a number and its double is 30. Find the number.

    View hint and full working

    Hint: Let the unknown number be x, form an equation, and then solve it.

    Working
    Let the number be x.
    x + 2x = 30
    3x = 30
    x = 10
    Answer: x = 10
  4. A number divided by 4 gives 9. Find the number.

    View hint and full working

    Hint: Let the unknown number be x, form an equation, and then solve it.

    Working
    Let the number be x.
    x/4 = 9
    x = 36
    Answer: x = 36
  5. When a number is multiplied by 5 and 10 is added, the result is 45. Find the number.

    View hint and full working

    Hint: Let the unknown number be x, form an equation, and then solve it.

    Working
    Let the number be x.
    5x + 10 = 45
    5x = 35
    x = 7
    Answer: x = 7

Level 5 Advanced Fraction Equations Practice 5 questions · Advanced 0/5

Tip: Clear fractions by cross multiplying or multiplying by the LCM of denominators.
  1. (2x + 3) / 4 = (5x − 1) / 6

    View hint and full working

    Hint: Cross multiply, expand the brackets and collect like terms.

    Working
    Cross multiply:
    6(2x + 3) = 4(5x − 1)
    12x + 18 = 20x − 4
    22 = 8x
    x = 11/4
    Answer: x = 11/4 (2.75)
  2. (3x − 2) / 5 = (2x + 7) / 10

    View hint and full working

    Hint: Cross multiply, expand the brackets and collect like terms.

    Working
    Cross multiply:
    10(3x − 2) = 5(2x + 7)
    30x − 20 = 10x + 35
    20x = 55
    x = 11/4
    Answer: x = 11/4 (2.75)
  3. (x + 4) / 3 = (2x − 1) / 5

    View hint and full working

    Hint: Cross multiply, expand the brackets and collect like terms.

    Working
    Cross multiply:
    5(x + 4) = 3(2x − 1)
    5x + 20 = 6x − 3
    x = 23
    Answer: x = 23
  4. (4x − 3) / 8 = (3x + 5) / 4

    View hint and full working

    Hint: Cross multiply, expand the brackets and collect like terms.

    Working
    Cross multiply:
    4(4x − 3) = 8(3x + 5)
    16x − 12 = 24x + 40
    −52 = 8x
    x = −13/2
    Answer: x = −13/2
  5. (2x + 1) / 6 = (x − 2) / 9

    View hint and full working

    Hint: Cross multiply, expand the brackets and collect like terms.

    Working
    Cross multiply:
    9(2x + 1) = 6(x − 2)
    18x + 9 = 6x − 12
    12x = −21
    x = −7/4
    Answer: x = −7/4

Level 6 Fractions with Variables on Both Sides Practice 5 questions · Advanced 0/5

Tip: Use the LCM to remove denominators, then collect like terms.
  1. x / 4 + 3 / 2 = x / 2

    View hint and full working

    Hint: Multiply by the lowest common multiple of the denominators before collecting like terms.

    Working
    Multiply by 4:
    x + 6 = 2x
    x = 6
    Answer: x = 6
  2. 2x / 3 − 5 / 6 = x / 6

    View hint and full working

    Hint: Multiply by the lowest common multiple of the denominators before collecting like terms.

    Working
    Multiply by 6:
    4x − 5 = x
    3x = 5
    x = 5/3
    Answer: x = 5/3
  3. (x − 1) / 5 + x / 10 = 3

    View hint and full working

    Hint: Multiply by the lowest common multiple of the denominators before collecting like terms.

    Working
    Multiply by 10:
    2(x − 1) + x = 30
    2x − 2 + x = 30
    3x = 32
    x = 32/3
    Answer: x = 32/3
  4. 3x / 8 + 2 = x / 2

    View hint and full working

    Hint: Multiply by the lowest common multiple of the denominators before collecting like terms.

    Working
    Multiply by 8:
    3x + 16 = 4x
    x = 16
    Answer: x = 16
  5. 5x / 6 − x / 3 = 7

    View hint and full working

    Hint: Multiply by the lowest common multiple of the denominators before collecting like terms.

    Working
    Multiply by 6:
    5x − 2x = 42
    3x = 42
    x = 14
    Answer: x = 14

Level 7 Brackets and Fractions Practice 5 questions · Advanced 0/5

Tip: Expand brackets first, then clear fractions if needed.
  1. 2(x + 3) + x / 2 = 15

    View hint and full working

    Hint: Expand the brackets first, then clear fractions and simplify.

    Working
    2x + 6 + x/2 = 15
    Multiply by 2:
    4x + 12 + x = 30
    5x = 18
    x = 18/5
    Answer: x = 18/5 (3.6)
  2. 3(2x − 1) − x / 3 = 14

    View hint and full working

    Hint: Expand the brackets first, then clear fractions and simplify.

    Working
    6x − 3 − x/3 = 14
    Multiply by 3:
    18x − 9 − x = 42
    17x = 51
    x = 3
    Answer: x = 3
  3. 1/2(x + 6) + 1/4(x − 2) = 10

    View hint and full working

    Hint: Expand the brackets first, then clear fractions and simplify.

    Working
    Multiply by 4:
    2(x + 6) + (x − 2) = 40
    2x + 12 + x − 2 = 40
    3x = 30
    x = 10
    Answer: x = 10
  4. 4(x − 5) + 2x / 3 = 2x

    View hint and full working

    Hint: Expand the brackets first, then clear fractions and simplify.

    Working
    4x − 20 + 2x/3 = 2x
    Multiply by 3:
    12x − 60 + 2x = 6x
    8x = 60
    x = 15/2
    Answer: x = 15/2 (7.5)
  5. 5(x + 2) − x / 5 = 24

    View hint and full working

    Hint: Expand the brackets first, then clear fractions and simplify.

    Working
    5x + 10 − x/5 = 24
    Multiply by 5:
    25x + 50 − x = 120
    24x = 70
    x = 35/12
    Answer: x = 35/12

Level 8 Challenging Algebra Word Problems Practice 5 questions · Challenge 0/5

Tip: These questions need careful translation into equations.
  1. A number increased by 20% becomes 72. Find the original number.

    View hint and full working

    Hint: Translate the words into an equation before starting the algebra.

    Working
    Let the original number be x.
    120% of x = 72
    1.2x = 72
    x = 60
    Answer: x = 60
  2. One-third of a number plus 7 equals half the number. Find the number.

    View hint and full working

    Hint: Translate the words into an equation before starting the algebra.

    Working
    Let the number be x.
    x/3 + 7 = x/2
    Multiply by 6:
    2x + 42 = 3x
    x = 42
    Answer: x = 42
  3. Twice a number minus 15 equals one-fourth of the number. Find the number.

    View hint and full working

    Hint: Translate the words into an equation before starting the algebra.

    Working
    Let the number be x.
    2x − 15 = x/4
    Multiply by 4:
    8x − 60 = x
    7x = 60
    x = 60/7
    Answer: x = 60/7
  4. A number divided by 5 and then increased by 6 equals half the number. Find the number.

    View hint and full working

    Hint: Translate the words into an equation before starting the algebra.

    Working
    Let the number be x.
    x/5 + 6 = x/2
    Multiply by 10:
    2x + 60 = 5x
    3x = 60
    x = 20
    Answer: x = 20
  5. The sum of a number and its reciprocal is 10/3. Find the number.

    View hint and full working

    Hint: Translate the words into an equation before starting the algebra.

    Working
    Let the number be x.
    x + 1/x = 10/3
    Multiply by 3x:
    3x² + 3 = 10x
    3x² − 10x + 3 = 0
    (3x − 1)(x − 3) = 0
    x = 3 or x = 1/3
    Answer: x = 3 or x = 1/3
Algebra basics guide

Algebra Basics Explained

Use this guide to review the main algebra words, rules and techniques after completing the practice test. The explanations begin with pronumerals and expressions, then progress to substitution, like terms, brackets, factorising and equations.

What Is Algebra and Why Do We Use It?

Algebra is a branch of maths that uses letters, numbers and symbols to represent values and relationships. A letter can stand for an unknown number or a value that may change.

Example x + 5 = 12

The letter x represents the unknown number. Algebra gives us an organised method for finding it instead of relying on guessing.

Algebra is useful for describing number patterns, solving real-life problems, writing formulas and showing how quantities are related.

What Topics Are Covered in Algebra?

Students gradually develop their algebra skills through topics such as:

  • pronumerals, variables, constants and coefficients;
  • algebraic expressions and equations;
  • algebraic notation and powers;
  • writing algebra from everyday language;
  • substitution into expressions and formulas;
  • number patterns and algebraic rules;
  • like and unlike terms;
  • simplifying algebraic expressions;
  • expanding brackets;
  • factorising expressions;
  • linear and fraction equations;
  • algebraic word problems.

Pronumerals, Variables, Constants and Coefficients

Pronumeral

A letter or symbol used to represent a number. In x + 5, the letter x is a pronumeral.

Variable

A pronumeral that can take different values. For example, the value of x may change in different questions.

Constant

A number whose value does not change. In 3x + 7, the number 7 is a constant.

Coefficient

The number multiplying a pronumeral. In 3x, the coefficient of x is 3.

Algebraic Expressions and Equations

An algebraic expression is made from numbers, pronumerals and operations such as addition, subtraction, multiplication and division.

Examples of expressions 3x    2a + 5    x ÷ 2 + 4

An expression does not contain an equals sign. An equation states that two expressions have the same value and includes an equals sign.

Equation 2x + 5 = 17

Solving the equation means finding the value of x that makes the statement true.

For more equation examples, visit the simple linear equations guide and practice test.

Algebraic Notation

Algebraic notation is a shorter way to write multiplication, powers and division.

ab means a × b.
xyz means x × y × z.
a2 means a × a.
y3 means y × y × y.
a/b means a ÷ b.
Write 4x, rather than 4 × x.

Indices are used when a factor is multiplied by itself repeatedly. Review the indices laws guide and practice questions for further examples.

Writing Algebraic Expressions From Words

Many algebra questions require you to translate everyday language into an expression.

  • “Five more than a number” becomes x + 5.
  • “A number divided by 3” becomes x/3.
  • “Double a number and subtract 7” becomes 2x − 7.
  • “Three less than four times a number” becomes 4x − 3.
Watch the order

“Five less than x” means x − 5, not 5 − x.

Algebraic Substitution

Substitution means replacing a pronumeral with a given value.

Evaluate 4x + 1 when x = 3 4(3) + 1 = 12 + 1 = 13

Therefore, the value of 4x + 1 is 13.

Students needing more examples can use the Year 7 algebra substitution guide and free practice questions.

Using Algebra to Describe Number Patterns

Algebra can describe how the terms in a number pattern are formed.

Pattern 3, 5, 7, 9, 11, ...

The rule is 2n + 1, where n is the position of the term and begins at 1.

n = 1: 2(1) + 1 = 3 n = 2: 2(2) + 1 = 5

Like and Unlike Terms

Like terms have the same pronumeral raised to the same power. They can be added or subtracted by combining their coefficients.

3x + 4x = 7x 5a − 2a = 3a 2x2 + 6x2 = 8x2

Unlike terms cannot be combined. For example, 2x + 3y stays the same because x and y are different pronumerals.

Properties of Arithmetic in Algebra

Commutative property

The order can change when adding or multiplying.

a + b = b + a ab = ba

Associative property

The grouping can change when adding or multiplying.

(a + b) + c = a + (b + c) (ab)c = a(bc)

Distributive property

Multiply the term outside the brackets by every term inside.

a(b + c) = ab + ac

When several operations appear together, use the correct order of operations. The BODMAS guide and free worksheet explains the correct sequence.

Expanding and Factorising Expressions

Expanding removes brackets by applying the distributive property.

3(x + 4) = 3x + 12

Factorising is the reverse process. Identify a common factor and place the remaining terms inside brackets.

ab + ac = a(b + c) 6x + 9 = 3(2x + 3)

Algebraic Equations and Word Problems

To solve an equation, use inverse operations and perform the same operation on both sides. In a word problem, first decide what the unknown represents, write an equation and then solve it carefully.

Example

Three times a number minus 5 equals 16.

3x − 5 = 16 3x = 21 x = 7

Still Finding Algebra Difficult?

Some students can follow worked examples but still become unsure when the equation changes. A free maths assessment can help identify whether the difficulty comes from number skills, fractions, algebraic notation or equation-solving steps.

View Free Assessment Times
NAPLAN Year 5 Numeracy 320-question analysis showing key maths skills and question patterns

NAPLAN Year 5 Numeracy 2026: 320-Question Analysis

A detailed guide to NAPLAN Year 5 Numeracy based on current ACARA test specifications and our analysis of 320 questions from eight past NAPLAN papers. See the most common topics, question styles, difficulty patterns and practical time-management strategies for Year 5 students.

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