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13 July, 18:25

Twice the difference of a number and 8 is equal to three times the sum of the number and 3. Find the number

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  1. 13 July, 20:51
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    X=number looked for

    Twice the difference of a number and 8=2 (x-8)

    Three times the sum of the number and 3=3 (x+3)

    We suggest this equation:

    2 (x-8) = 3 (x+3)

    2x-16=3x+9

    2x-3x=9+16

    -x=25

    x=-25

    The number is - 25.

    To check:

    Twice the difference of a number and 8=2 (-25-8) = 2 (-33) = - 66

    Three times the sum of the number and 3=3 (-25+3) = 3 (-22) = - 66
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