algebra

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What are the steps to figuring out x and y in 3x + 5y = 39.89 and what does x and y equal in the end?

  • algebra -

    you can pick any value for x or y and then figure the other one out:

    x=10:
    3(10)+5y=39.89
    30+5y=39.89
    5y=9.89
    y = 1.978

    y=-20:
    3x+5(-20) = 39.89
    3x-100=39.89
    3x=139.89
    x=46.63

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