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    cupcake13's Avatar
    cupcake13 Posts: 1, Reputation: 1
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    #1

    Mar 16, 2010, 01:59 PM
    v-w=-5 v-2w=4
    v - w = -5 v - 2w = 4
    Chaosrox's Avatar
    Chaosrox Posts: 5, Reputation: 1
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    #2

    Mar 16, 2010, 03:27 PM

    eq 1: v-w=-5v-2w
    simplifying: w=6v

    eq 2: 5v-2w=4
    then substituting 6v in for w
    5v-2(6v)=4
    -7v=4

    v=-4/7 and w=24/7
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Mar 17, 2010, 07:04 AM

    Uhhh, I think that the actual question was:




    The easiest method in this case is the elimination method, here done by subtracting the second equation from the first, giving:



    Plugging back w, you get:
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