4024/11 May/Jun 2021, Question 18: Simultaneous Equations by Elimination
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Solve the simultaneous equations x + 6y = 0 and 3x − 2y = 10, showing working.
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Solution · 3 marks
- 1From x + 6y = 0: x = −6y
- 23(−6y) − 2y = 10
- 3−20y = 10, y = −1/2
- 4x = −6 × (−1/2) = 3
- 5x = 3, y = −1/2
Answerx = 3, y = −1/2
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Also searched as: 4024/11/M/J/21 · 4024_s21_qp_11 · 4024 s21 11 · question 18.
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