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algebra

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3r-5s=-14 3r+3s-56

  • algebra -

    subtract the second equation from the first...

    3r-3r-5s-3s=-14+?56

    I am not certain on your second equation, an equals is missing.

  • algebra -

    I tried and verified the equation with the following assumption to make it work.

    3r - 5s = -14
    3r +3s = 56

    subtract the second equation from first equation:

    You will get -8s = -70

    s = 70/8

    substitute s in any of the original problem equations to get the value of r.
    3r = -14 + 5s

    3r = -14 + 5 (70/8)
    = (-112 + 350)/8
    = 238/8
    3r = 119/4

    r = 119/12

    To verify the values - apply the values to one of the equations to hold true.

    3r -5s should be equal to -14

    = 3 (119/12) - 5 (70/8)

    = 119/4 - 350/8

    = (238 - 350) / 8

    = -112/8

    = -14

    So we are good!

    Additional note regarding posting of your question:

    So, your problem statement should be

    3r + 3s = 56

    Hope this clarifies!

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