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    Adderb's Avatar
    Adderb Posts: 11, Reputation: 1
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    #1

    Jan 19, 2007, 12:07 PM
    Substitution method problem
    2a - 3b = -13
    -b = -2a - 7

    Help?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Jan 19, 2007, 12:58 PM
    from your second equation, b = 2a + 7,

    put this into your first equation, and you will have an equation in terms of a
    Once you have a value for a, you can work out b.

    If you need further help, just ask!
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #3

    Jan 20, 2007, 02:24 AM
    Well yes gal, but the topic was "sub method problem" :p
    taylor458031's Avatar
    taylor458031 Posts: 1, Reputation: 1
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    #4

    Feb 5, 2007, 07:57 PM
    5x-3y=-4
    x+y=-4
    cottoncandy_27713's Avatar
    cottoncandy_27713 Posts: 1, Reputation: 1
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    #5

    Feb 27, 2007, 10:52 AM
    Solve the system: x+6y=-2
    5x-20y=5
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #6

    Feb 27, 2007, 10:59 AM
    Hi guys, we recommend you open a new post if you have a new question.

    You can use the same method that I outlined above though.
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