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24 June, 09:52

The variable Z is directly proportional to X. When X is 6, Z has the value 18. What is the value of Z when X=10

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  1. 24 June, 11:31
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    Make a proportion

    6/18 = 10/z

    Cross multiply

    180 = 6z

    180/6 = z

    Z = 30
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