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Math Help - Need help on a simultaneous equation...

  1. #1
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    Dec 2011
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    Question Need help on a simultaneous equation...

    I have tried the other questions but i'm stuck on this last 3 and would really appreciate the help as I am finding it difficult.

    2x+3y=12 x=?
    3x+y=11 y=?

    4x+3y=15 x=?
    x-2y=12 y=?

    x+4y=14 x=?
    3x+2y=-3 y=?

    Thanks.
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  2. #2
    Super Member Quacky's Avatar
    Joined
    Nov 2009
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    Windsor, South-East England
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    901

    Re: Need help on a simultaneous equation...

    For 1) Multiply the second equation by 3, and then solve by elimination. For 2) use the fact that x=2y+12 and substitute this into the first equation. For 3), multiply the second equation by 2 and then solve by elimination.

    If you seek further help, please show some work.
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