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    algebra_5's Avatar
    algebra_5 Posts: 1, Reputation: 1
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    #1

    Oct 27, 2009, 05:42 PM
    Use elimination to solve each system of equations
    x + y = -3
    x -y = 1
    alaina_girl's Avatar
    alaina_girl Posts: 1, Reputation: 1
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    #2

    Oct 27, 2009, 08:08 PM
    pretend this is a simple math problem... line it up...

    X + Y = -3
    X - Y = 1
    --------------
    2x +0Y=-2

    Simplify

    2x=-2

    Divide both sides by 2

    2x/2=-2/2

    Simplify

    X=-1

    Now select one of the equations and plug in to solve for Y

    (-1) + Y = -3

    Y = -2

    Double check your answer in BOTH equations

    (-1) + (-2) = -3?? YES!

    (-1) - (-2) = 1?? YES!

    X = -1
    Y = -2
    crystal_coreen1's Avatar
    crystal_coreen1 Posts: 1, Reputation: 1
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    #3

    Oct 29, 2009, 04:35 PM

    x+12y=68
    x=8y-12
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Oct 29, 2009, 11:39 PM

    You should have started your own thread, crystal_coreen1. And, read the rules first before posting. You should then know that you are not allowed to post your homework here. However, if you do, then you have to post your own part of the work, what you tried to solve the problem. We are not going to give you directly the answers.
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