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1 January, 09:51

6 + 12 (x + 3) = 7x + 30 + 6x

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  1. 1 January, 12:10
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    x=12

    Explanation:

    6+12 (x+3) = (7x+6x) + 30

    12x + (36+6) = 13x+30

    12x+42=13x+30

    42 = (13x-12x) + 30

    42=1x+30

    42-30=1x

    12=1x

    12:1=12
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