0580/13 Oct/Nov 2022, Question 20: Simultaneous Equations by Elimination
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 2 marks
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The question, in short
Solve the pair of simultaneous equations 3x − 2y = 21 and 5x + 2y = 51 for x and y.
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Solution · 2 marks
- 1Add the equations: 8x = 72, so x = 9
- 23 × 9 − 2y = 21, so 2y = 6
- 3x = 9, y = 3
Answerx = 9, y = 3
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Also searched as: 0580/13/O/N/22 · 0580_w22_qp_13 · 0580 w22 13 · question 20.
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