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math8

posted by on .

20-(12-x)=38


and

5(3c-c)+3=43

  • math8 - ,

    20-(12-x)=38

    8 - x = 38

    x = -30


    I'll be glad to check your answer for the second problem.

  • math8 - ,

    5(3c-c)+3=43

    (15c-5c)+3=48
    -3 -3
    ---------------
    15c-5c= 45
    +5 +5
    ---------------
    15c = 45

    c=3

  • math8 - ,

    5(3c-c)+3=43

    15c - 5c + 3 = 43

    10c = 43 - 3

    10c = 40

    c = 4

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