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algebra

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Solve by using the elimination method.

9x-y=72
x+4y=45

  • algebra - ,

    9x-y=72
    x+4y=45
    get either x to be same value or y... in this case i chose y
    4(9x-y=72)
    x+4y=45
    so
    36x-4y=288
    x+4y=45
    so
    37x=333
    x= 9
    then plug 9 into one of the equation to get y.

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