0580/12 Feb/Mar 2022, Question 11: Solving Linear Equations
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Joe squares a positive number n, adds the result to −24 and gets 25; find n.
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Solution · 2 marks
- 1n² − 24 = 25
- 2n² = 49
- 3n = 7 (positive)
Answer7
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