0580/11 Oct/Nov 2025, Question 8: Substitution
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Non-calculator · 2 marks
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The question, in short
Given p = 3q − 2r, find q when p = 50 and r = 5.
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Solution · 2 marks
- 150 = 3q − 2 × 5
- 250 = 3q − 10, so 3q = 60
- 3q = 20
Answer20
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Also searched as: 0580/11/O/N/25 · 0580_w25_qp_11 · 0580 w25 11 · question 8.
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