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29 August, 01:01

If n is the average of three numbers x, 12, and 15, what is the value of x?

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  1. 29 August, 01:04
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    9 - because it looks like 12 and 15 were multiplied by 3,

    3x5 = 15

    3x4 = 12

    3x3 = 9
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