0580/13 Oct/Nov 2023, Question 23: Simultaneous Equations by Elimination
Cambridge IGCSE Mathematics 0580 · Paper 13 (Core) · Calculator · 3 marks
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The question, in short
Solve the simultaneous equations 3x + 5y = 23 and 6x − 4y = 11, showing all working.
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Solution · 3 marks
- 1(first equation) × 2: 6x + 10y = 46
- 2Subtract 6x − 4y = 11: 14y = 35, so y = 2.5
- 33x + 5 × 2.5 = 23 → 3x = 10.5
- 4x = 3.5, y = 2.5
Answerx = 3.5, y = 2.5
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Also searched as: 0580/13/O/N/23 · 0580_w23_qp_13 · 0580 w23 13 · question 23.
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