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26 July, 05:20

If a varies directly as b and a=3 when b=12, what is the value of a when b=18?

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  1. 26 July, 05:27
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    Step-by-step explanation:

    a & b

    a = kb

    a = 3 and b = 12

    k = a/b

    k = 3/12

    k = 1/4

    a = b/4

    Finding a when b = 18

    a = 18/4

    a = 9/2

    a = 4 1/2
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