0580/32 May/Jun 2026, Question 14: Constructing Equations
Cambridge IGCSE Mathematics 0580 · Paper 32 (Core) · Calculator · 7 marks
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The question, in short
A jar starts with 60 counters; Kan adds C and Mo adds 2C + 7. Form a simplified total, then split it equally and use a given share to find C.
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Part (a) · 2 marks
Combine the starting 60 with C and 2C + 7 to give the jar's new total in simplest form.
- 160 + C + 2C + 7
- 2= 3C + 67
Answer3C + 67
Part (bi) · 1 mark
Express how many counters each person gets when the total is split into two equal shares.
- 1Total counters = 60 + C + (2C + 7) = 3C + 67
- 2Share equally between 2 people: each receives (3C + 67)/2
Answer(3C + 67)/2
Part (bii) · 4 marks
Given that each share equals 86, solve for the value of C.
- 1Total counters = 60 + C + (2C + 7) = 3C + 67
- 2Each gets half the total: (3C + 67)/2 = 86
- 3Multiply by 2: 3C + 67 = 172
- 43C = 172 − 67 = 105, so C = 35
Answer35
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