0580/11 Oct/Nov 2024, Question 13: Substitution
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 4 marks
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The question, in short
Substitute c = 3 and d = −4 into 6c + 7d to find its value, then solve the equation 6x + 8 = 11x + 4 for x.
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Part (a) · 2 marks
Work out the value of 6c + 7d given c = 3 and d = −4.
- 16 × 3 + 7 × (−4) = 18 − 28
- 2= −10
Answer−10
Part (b) · 2 marks
Solve 6x + 8 = 11x + 4 to find x.
- 18 − 4 = 11x − 6x
- 24 = 5x
- 3x = 4/5 = 0.8
Answer4/5 or 0.8
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Also searched as: 0580/11/O/N/24 · 0580_w24_qp_11 · 0580 w24 11 · question 13.
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