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19 April, 22:32

Y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?

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  1. 19 April, 23:01
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    Try this:

    21/7=3

    multiply 3x2

    x=6

    y=21 x=6

    or ...

    7/2=21/x

    cross multiply to get 7x=42

    divide by 7 and x=6
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