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29 June, 03:46

If y varies directly as x and y = 14 when x = 7, find x when y is 30

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  1. 29 June, 06:25
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    If directly proportional then y=kx so

    14=k x (7) so k=2

    Y=kx

    Y=2x

    30=2 x

    Divide both by 2

    X=15
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