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Posted by on Thursday, September 8, 2011 at 9:19pm.

3x-2y+z=9
x-y+4z=10
2x+3y-z=53

  • algebra 2 - , Thursday, September 8, 2011 at 9:50pm

    besides a calculator solution? Your calculator should be able to solve these.

    Manually:
    add the first and third equations:
    5x+y=62

    multipy the first equation by 4
    12x-8y+4z=36 and subtract equation 2 from that, or
    11x-7y=26, and combine that with the original combination:

    11x-7y=26
    6x+y=62

    now multipy the second equation by 7, then add the equations.

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