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    kristen5's Avatar
    kristen5 Posts: 1, Reputation: 1
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    #1

    Jan 31, 2009, 12:13 PM
    Plotting equations
    I don't know how to substitute and eliminate
    2x-3y=5
    4x-6y=21
    Can some one show me how to solve for x and y
    sarnian's Avatar
    sarnian Posts: 462, Reputation: 9
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    #2

    Jan 31, 2009, 08:00 PM
    Kristen

    2x-3y=5
    4x-6y=21

    Nobody can help you with that, as the data you provide is incorrect.
    If 2x-3y=5 , than the double of (2x-3y) = 2(2x-3y) = 4x-6y should be 2x5 = 10.
    But your data states 21.
    Is there a sign incorrect ?
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