4024/12 May/Jun 2023, Question 21: Solving Linear Equations
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 4 marks
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The question, in short
Solve the equation 5x ÷ (x − 3) = x + 4, showing working for full marks.
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Solution · 4 marks
- 15x = (x + 4)(x − 3)
- 25x = x² + x − 12
- 3x² − 4x − 12 = 0
- 4(x − 6)(x + 2) = 0
- 5x = −2 or x = 6
Answer−2, 6
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Also searched as: 4024/12/M/J/23 · 4024_s23_qp_12 · 4024 s23 12 · question 21.
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