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6 February, 06:12

The variable Z is directly proportional to X. When X is 6, has the value of 72. What is the value of Z when X = 13

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  1. 6 February, 06:25
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    6 / 72 = 13 / z

    cross multiply

    (6) (z) = (72) (13)

    6z = 936

    z = 936/6

    z = 156 <==
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