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24 April, 14:04

If the sum of a number and nine is doubled, the result is seven less than the number. find the number.

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  1. 24 April, 16:50
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    X=the number we have to find.

    This expression "2 (x+9) " is when the sum of a number and nine is doubled.

    If the result is seven less than the number, we will have: x-7

    We can suggest the following equation:

    2 (x+9) = (x-7)

    2x+18=x-7

    2x-x=-7-18

    x=-25

    answer: the number would be: - 25.
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