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Question

Help please

Source: Methodist Girls’ School Primary

Answer

Let the total number of cushions be 4 units.

Week 1: 1u

Week 2: 28

Week 3: 3u – 28

1u + 28 = 7/5 × (3u – 28)

1u = 21

a) Week 3 = 3u – 28 = 35

b) Total = 4u = 84

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