Maths dictionary

What is an equation?

An equation is a statement that two expressions are equal. Solving it means finding the value of the unknown.

Definition

An equation is a statement that two expressions are equal. Solving it means finding the value of the unknown.

Example

In 3x + 5 = 20, x is 5.

Tip

Whatever you do to one side, do to the other.

Practise it

Play: Equation Balance
Worksheets: One-step equations (Grade 6)
Worksheets: Two-step equations (Grade 7)
Online maths practice

Quick check: try these

Work each one out on paper, then tap the question to see the answer.

Solve x − 2 = 12. x =
Answer: 14
Solve x ÷ 7 = 14. x =
Answer: 98
Solve x ÷ 4 = 14. x =
Answer: 56
Solve x − 5 = 18. x =
Answer: 23

Learn it in depth

Equation is part of Linear Equations in One Variable for Class 8: notes, formulas, solved examples with every step, common mistakes and ten practice questions with answers. Want a teacher to go through it with you? See Class 8 maths tuition.

Related words

Variable, Slope (gradient)