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6 December, 05:22

Three times the sum of a number and seven is two less than five times the number.

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  1. 6 December, 06:01
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    3 (x + 7) = 5x - 2

    3x + 21 = 5x - 2

    3x - 5x = - 2 - 21

    -2x = - 23

    x = - 23/-2

    x = 23/2
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