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12 December, 16:50
7/a = 28/40 how to do this
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Steve Oneal
12 December, 18:38
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So first we cross multiply
7/a times 7/40 which equals = 28a and 280
Divided both sides by 28.
28a divided by 28 = A. Then 280 divided = 10
So a = 10
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