0580/43 Oct/Nov 2025, Question 14: Constructing Equations
Cambridge IGCSE Mathematics 0580 · Paper 43 (Extended) · Calculator · 5 marks
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The question, in short
Three expressions (5x − 2)/3, 10 − x and y + 11 have equal values. Find the value of y.
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Solution · 5 marks
- 1(5x − 2)/3 = 10 − x
- 25x − 2 = 30 − 3x
- 38x = 32, so x = 4
- 410 − 4 = y + 11
- 56 = y + 11, so y = −5
Answer−5
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