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    claudia3's Avatar
    claudia3 Posts: 1, Reputation: 1
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    #1

    Mar 21, 2007, 08:51 AM
    Elimination method:
    a. 3x+4y= -7
    b. 2x+3y= -6
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Mar 21, 2007, 09:02 AM
    well from your first one you find that

    3x = -7-4y

    so

    x = -7/3 - 4y/3

    now you can substitute this in for x in your second equation

    2(-7/3 - 4y/3) + 3y = -6

    you can now solve this for y to get a value of y

    then you can use your original equations and this value of y to find the value for x

    let me know if you need further help
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
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    #3

    Mar 21, 2007, 08:15 PM
    Capuchin she specifically said elimination method. What you did was the substitution method.

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