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Math Help - Help find value for y

  1. #1
    axi
    Guest

    Help find value for y

    when...

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

    what is y? I don't know how to solve this, please help. TY.
    Last edited by axi; November 6th 2005 at 05:30 PM.
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  2. #2
    Junior Member
    Joined
    Oct 2005
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    Is the 2 in eq#1 supposed to be 'z' ?
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  3. #3
    Newbie
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    Oct 2005
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    Reply

    The solution is attached for your reference.
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  4. #4
    MHF Contributor
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    Quote Originally Posted by axi
    when...

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

    what is y? I don't know how to solve this, please help. TY.
    Yes, I think for the first one you meant: 3x+3y+2x=9. There are actually many ways to do this problem, substitution being the longest and matrices being the shortest. Are you familiar with matrices and their inverses?
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