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6 September, 16:28

3c+-9=18 I don't know how to do this problems

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  1. 6 September, 16:39
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    3 because you have to add - 9 to 18 then divide 3c by tht answer
  2. 6 September, 16:56
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    3c+-9=18

    +-=-

    3c-9=18

    move 9c to the other side and the sign changes from negative to positive.

    3c-9+9 = 18+9

    3c = 27

    Divide by 3

    c=9
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