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21 March, 04:11

The average of two numbers is twice the positive difference between if the smaller number is 9 what's my answer?

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  1. 21 March, 04:19
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    Let b, be the smallest number : Note the average of a+b = (a+b) / 2

    (a+b) / 2 = 2 (a-b)

    a+b = 4 (a-b)

    a+b = 4a - 4b, but b = 9, then plug:

    a+9 = 4a - 36

    -3a = - 45

    3a = 45

    and a = 15
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