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11 June, 19:12

Twice the difference of a number and 7 is 9

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  1. 11 June, 19:24
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    So you know 2 (x-7) = 9 so solve for x 9/2=x-7 add 7 and x=23/2

    (or 11 and 1/2 if you change to whole numbers)
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