# Solve Simple Equations Involving Addition and Subtraction

In this worksheet, students will solve simple one-stage equations.

Key stage:  KS 3

Curriculum topic:   Algebra

Curriculum subtopic:   Solve Linear Equations (One Variable)

Popular topics:   Algebra worksheets, Year 7 Algebra worksheets

Difficulty level:

#### Worksheet Overview

When we solve algebraic equations, our aim is to end up with one letter on one side of the equals sign and one number on the other. This is the solution.

It doesn't matter if you end up with the letter on the left or the right, it means the same thing. (a = 6 is exactly the same as 6 = a)

We do this by using inverse operations to undo things that get in the way, but remember that we must do the same thing to both sides.

Example

Solve for a

5 - a = 10

5 - a + a = 10 + a

Simplify

5 = 10 + a

Subtract 10 from both sides.

5 - 10 = 10 - 10 + a

Simplify

-5 = a

a = -5

We're going to practise lots of these in this activity.

Good luck!

### What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started