Solving-Linear-Equations Edexcel Foundation

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Exam code:1MA1

Solving linear equations

What are linear equations?

A linear equation is one that can be written in the form $a x plus b equals c$
- $a comma space b comma$ and $c$ are numbers and $x$ is the variable
  - 2x + 3 = 5
  - 3x + 4 = 1
  - x – 5 = -3
The greatest power of x is 1
- There are no terms like x²

How do I solve linear equations?

You need to use operations like adding, subtracting, multiplying and dividing to get x on its own
Any operation you do to one side of the equation must also be done to the other side
For example, to solve $2 x plus 1 equals 9$ look at the +1 on the left
- Undo this by subtracting 1 from both sides and simplifying

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Maths Gcse Edexcel Foundation

Solving-Linear-Equations Edexcel Foundation