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8 September, 01:27

The product of 13 and the difference between a number and 7 yields 2 times the number plus 3

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  1. 8 September, 01:51
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    13 (n-7) = 2n+3

    expand

    13n-91=2n+3

    minus 2n both sides

    11n-91=3

    add 91 both sides

    11n=94

    divide both sides by 11

    n=94/11
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