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22 October, 14:57

One number is 4 times another. their product is 16 times their sum. find the numbers.

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  1. 22 October, 15:10
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    Let the 2 numbers be x and y. then x=4y. xy=16 (x+y)

    4y²=16 (5y)

    4y²-80y=0

    4y (y-20)

    y=0 or y=20

    x=4*20=80

    the numbers are 20 and 80
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