4024/12 Oct/Nov 2023, Question 12: Simultaneous Equations by Elimination
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Solve the simultaneous equations 5x + 4y = 14 and 3x − 2y = 15, showing all working.
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Solution · 3 marks
- 1Multiply the second equation by 2: 6x − 4y = 30
- 2Add to 5x + 4y = 14: 11x = 44
- 3x = 4
- 43 × 4 − 2y = 15 so −2y = 3
- 5x = 4, y = −3/2
Answerx = 4, y = −3/2
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Also searched as: 4024/12/O/N/23 · 4024_w23_qp_12 · 4024 w23 12 · question 12.
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