This key facts covers Method: Solving ax + b = c within Linear Equations for GCSE Mathematics. Revise Linear Equations in Algebra for GCSE Mathematics with 16 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 5 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Method: Solving ax + b = c
- Step 1: Deal with the + or - first (inverse operation)
- Step 2: Deal with the × or ÷ (inverse operation)
- Step 3: Check by substituting your answer back in
Inverse operations:
- + and - are inverses
- × and ÷ are inverses
Practice questions for Linear Equations
What is the solution to 3x = 12?
Solve x + 7 = 15
Quick recall flashcards
What does 'solving an equation' mean?
Finding the value of the unknown (e.g. x) that makes the equation true. You isolate x by doing the same operation to both sides.
Golden Rule of solving equations
Whatever you do to one side, you MUST do to the other side to keep the equation balanced.