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10 December, 00:45

Y varies directly as x

If x = 5 when y = 12 find x when y = 30

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  1. 10 December, 01:46
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    Set up a proportion so 12/5 = 30/x so cross multiply 5 times 30 is = to 12x now divide 150 (which is 30 times 5) by 12 and you get 12.5. So 12.5 is your answer

    y 12 - x 5

    y 30 - x?

    x = 30 * 5 : 12

    x = 12.5
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