4MA1/1F Jan 2021, Question 10: Simultaneous Equations by Elimination
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Given 5 chocolate bars cost $5.75 and 2 chocolate bars plus 3 packets of sweets cost $7.85, work out the price of one packet of sweets.
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Solution · 3 marks
- 1One chocolate bar = 5.75 ÷ 5 = 1.15
- 22 bars = 2 × 1.15 = 2.30
- 33 packets = 7.85 − 2.30 = 5.55
- 4One packet = 5.55 ÷ 3 = 1.85
Answer1.85
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