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2 September, 18:55

If the average (arithmetic mean) of two, seven, and X is 12, what is the value of X?

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  1. 2 September, 19:05
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    The average is always the sum of values divided by the number of values.

    (2+7+x) / 3=12

    Multiply both sides by 3

    2+7+x=36

    Combine like terms

    9+x=36

    Subtract 9 from both sides

    x=27

    Final answer: x=27
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