4MA1/2F Jun 2025, Question 25: Simultaneous Equations by Elimination
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 3 marks
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The question, in short
Solve the simultaneous equations 3x + 5y = 8 and 4x + y = −3.5, showing clear algebraic working.
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Solution · 3 marks
- 1Multiply the second equation by 5: 20x + 5y = −17.5
- 2Subtract from 3x + 5y = 8: −17x = 25.5
- 3x = −1.5
- 44 × −1.5 + y = −3.5, so y = −3.5 + 6
- 5y = 2.5
Answerx = −1.5, y = 2.5
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