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

    Nov 2, 2006, 04:15 PM
    linear system
    use substitution to find (x,y) where each pair of lines interesct.

    y=-2+3(x-7)
    y=10-5x
    s_cianci's Avatar
    s_cianci Posts: 5,472, Reputation: 760
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    #2

    Nov 2, 2006, 06:34 PM
    Since both 2 + 3(x - 7) and 10 - 5x are equal to y, and y = y obviously, set them equal to each other:

    2 + 3(x - 7) = 10 - 5x

    Solve this equation for x

    Then plug the value obtained in to either 2 + 3(x - 7) or 10 - 5x to find y
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