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Math Help - [SOLVED] solving system

  1. #1
    Scoobylover
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    Exclamation [SOLVED] solving system

    which one should i use for doing a substitution method?

    6y=x+18
    or
    2y-x=6
    Last edited by Scoobylover; March 5th 2007 at 05:46 PM.
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  2. #2
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    Quote Originally Posted by Scoobylover View Post
    which one should i use for doing a substitution method?

    6y=x=18
    or
    2y-x=6
    You have,

    6y-x=18
    Thus, x=6y-18

    Substitute that into equation (2),
    2y-(6y-18)=6
    2y-6y+18=6
    -4y=-12
    y=3
    Now you can find "x"
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