MathsYears 9–11Algebra

Rearranging formulae

Learn Rearranging formulae for Years 9–11 pupils (ages 13–16). Free practice questions, lessons and worked examples — aligned to the UK National Curriculum.

What you'll learn

  1. 1

    To make a different letter the subject, undo the operations around it — doing the same thing to both sides each time.

  2. 2

    Think of a balance. Whatever you do to one side you must do to the other, or it tips.

  3. 3

    Make x the subject of y = x + 5.

  4. 4

    Work out the order the subject is being operated on, then reverse it.

  5. 5

    Make x the subject of y = 3x + 2. Subtract 2: y − 2 = 3x. Divide by 3: x = (y − 2) ÷ 3.

  6. 6

    Make r the subject of C = 2πr.

  7. 7

    In y = 4x − 1, what should you undo FIRST?

Practise Rearranging formulae with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 13–16. Aligned to the UK National Curriculum.

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