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Changing the Subject of a Formula
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What does "make a letter the subject" mean?

What does "make a letter the subject" mean?

Flowchart showing p multiplied by 4 then increased by 13 to make z, with reverse arrows subtract 13 then divide by 4 to get p back

A formula links quantities, and the subject is the letter isolated on its own. If a question says "make xxx the subject", your final line should be x=somethingx = \text{something}x=something.

Changing the Subject of a Formula Lesson

  1. IGCSE
  2. /Maths
  3. /Changing the Subject of a Formula

Step-by-step lessons on Edexcel IGCSE Maths Changing the Subject of a Formula. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

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