4MA1/2F Jan 2020, Question 10: Simultaneous Equations by Elimination
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 4 marks
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The question, in short
Given 3 juice bottles cost $5.25 and 2 bottles plus 5 chocolate bars cost $9.75, work out the total cost of 5 bottles and 3 bars.
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Solution · 4 marks
- 1One bottle: 5.25 ÷ 3 = $1.75
- 2One bar: (9.75 − 2 × 1.75) ÷ 5 = 6.25 ÷ 5 = $1.25
- 3Total: 5 × 1.75 + 3 × 1.25 = 8.75 + 3.75 = $12.50
Answer12.50 or 12.5
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