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20 September, 15:28

F (x) varies directly with x and f (x) = 42 when x=14 find the value of f (x) when x=26

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  1. 20 September, 15:34
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    Step-by-step Explanation:

    f (x) varies directly w / x

    f (x) = 42

    x=14

    f (x) = kx

    k=3

    f (x) = 3x

    when x=26:

    f (x) = 3 (26)

    f (x) = 78
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