0580/21 Oct/Nov 2022, Question 11: Simultaneous Equations by Elimination
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Calculator · 2 marks
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The question, in short
Solve the pair of simultaneous equations x − 3y = 7 and 2x − 3y = 11 for x and y.
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Solution · 2 marks
- 1Subtract the first equation from the second: x = 4
- 24 − 3y = 7
- 3−3y = 3, so y = −1
Answerx = 4, y = −1
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