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12 December, 16:50

7/a = 28/40 how to do this

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  1. 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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