0580/23 May/Jun 2023, Question 17: Rearranging Formulas
Cambridge IGCSE Mathematics 0580 · Paper 23 (Extended) · Calculator · 4 marks
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The question, in short
Rearrange the formula R = 2(m − k)/m to make m the subject.
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Solution · 4 marks
- 1Rm = 2(m − k)
- 2Rm = 2m − 2k
- 32k = 2m − Rm
- 42k = m(2 − R)
- 5m = 2k/(2 − R)
Answer2k/(2 − R) or −2k/(R − 2)
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