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    alg2_dummie's Avatar
    alg2_dummie Posts: 1, Reputation: 1
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    #1

    Dec 3, 2007, 08:21 PM
    Solving linear systems by graphing
    I do not know how to solve and graph linear systems such as:

    x+y=2
    -3x+4y=36
    peeluu's Avatar
    peeluu Posts: 2, Reputation: 1
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    #2

    Nov 2, 2008, 11:11 PM

    solve by graphing. X - 2y = 7, -5x + y = 10
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    peeluu Posts: 2, Reputation: 1
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    #3

    Nov 2, 2008, 11:13 PM
    solve by graphing. X - 2y =7, -5x + y = 10
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Nov 4, 2008, 02:59 AM
    Quote Originally Posted by alg2_dummie
    I do not know how to solve and graph linear systems such as:

    x+y=2
    -3x+4y=36
    First of all, draw the graphs on a suitable graph paper as accurately as you can. I suggest a range of 0 to 10 on the y-axis and -5 to 2 on the x-axis.

    Where the two lines meet, give the coordinates of that point of intersection. That is the answer of your question. Note that the answer is in the form (x, y)
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    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Nov 4, 2008, 03:01 AM
    Quote Originally Posted by peeluu
    solve by graphing. x - 2y =7, -5x + y = 10
    Draw your graphs. The solution is given by the point where they meet.
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #6

    Nov 4, 2008, 06:26 PM
    Quote Originally Posted by alg2_dummie View Post
    I do not know how to solve and graph linear systems such as: x+y=2 ; -3x+4y=36
    Step one : solve the values of X and Y (x+y=2 ; so 3x+3y=6 ; while -3x+4y=36) Add together to solve.
    Step two : draw graph using X and Y values.
    Step three : measure resulting line to solve.

    :)
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