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6 January, 20:47

Solve equation 12d-9=15d+9

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  1. 6 January, 21:29
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    D = 0.6 repeating

    12d-9 = 15d+9

    get constants alone to one side

    move 15d and add with 12d (you can only combine like terms.)

    27d-9=9

    cange - 9 to plus 9 so

    27d-9=9

    +9+9

    9+9 = 18

    27d=18

    27 divided by 27 carry to other side

    27/27d = 18/27

    d=0.6 repeaing
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