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26 August, 17:42

X:y=5:3 and x+y=56 work out the value of x-y

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  1. 26 August, 21:20
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    x - y = 14

    given the ratio x : y = 5 : 3

    then let x = 5x and y = 3x, hence equation can be expressed as

    5x + 3x = 56

    8x = 56 (divide both sides by 8)

    x = 7

    Hence x = 5 * 7 = 35 and y = 3 * 7 = 21

    Thus x - y = 35 - 21 = 14
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