4MA1/2H Jun 2020, Question 15: Rearranging Formulas
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 4 marks
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The question, in short
Rearrange y = (5 − 2x)/(x + 3) to make x the subject, showing the algebraic steps.
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Solution · 4 marks
- 1y = (5 − 2x)/(x + 3)
- 2(x + 3)y = 5 − 2x
- 3xy + 3y = 5 − 2x
- 4xy + 2x = 5 − 3y
- 5x(y + 2) = 5 − 3y
- 6x = (5 − 3y)/(y + 2)
Answer(5 − 3y)/(y + 2)
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