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    victor3572's Avatar
    victor3572 Posts: 1, Reputation: 1
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    #1

    Jun 23, 2010, 02:38 PM
    using the substituiton method how would i solve this problem?
    using the substitution method how do I solve this equation?

    x+2y=0
    y=x-3
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jun 23, 2010, 11:38 PM





    Do you have the 'meaning' of y? Yes, you have y = x - 3. So, use that equation in your first equation like this:



    Since y is the same thing as x-3 in the second equation, I can substitute it in the first equation.

    Now, expand, simplify and solve for x. When you get the value of x, find the value of y, using the value of x.

    I hope it helped! Post your answer! :)
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