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27 February, 09:04

The variable y is directly proportional to the variable x. If y = 10 when x = 6, what is the value of y when x = 15?

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  1. 27 February, 11:46
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    Create a proportion:

    x/y = 6/10

    Plug in 15 for x and solve for y.

    15/y = 6/10

    Cross multiply.

    150 = 6y

    Divide both sides by 6.

    y = 25
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