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math

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y=x/4+4
x=21.5+7y/8

  • math - ,

    it's usually easier if yu clear fractions. So,multiply #1 by4, #2 by 8:

    4y = x + 16
    8x = 172 + 7y

    now you can rearrange things as you wish:

    -x + 4y = 16
    8x - 7y = 172

    solution: (32,12)

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