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Math Help - Simultaneous Equations help

  1. #1
    Junior Member 22upon7's Avatar
    Joined
    Nov 2008
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    Simultaneous Equations help

    Hi,

    I don't understand how to work this sum out, a step-by-step explanation would be much appreciated.

    Find the value of m for which the following simultaneous equations have no solutions.

    (m+2)x+my=12
    (m-1)x+(m-2)y=7

    Thanks,

    Drew
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  2. #2
    Senior Member Stroodle's Avatar
    Joined
    Jun 2009
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    If you solve these equations simultaneously you should get:

    x=\frac{5m-24}{m-4} and y=\frac{26-5m}{m-4}

    So now you can see that there will be no solutions when m=4 as when m is this value x and y will be undefined.
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