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Math Help - [SOLVED] need a little help graphing some linear equations please!

  1. #1
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    Joined
    Jul 2009
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    [SOLVED] need a little help graphing some linear equations please!

    The following pair of equations came with the instruction:
    Solve by graphing.

    2x+y=5
    3x-y=10


    I have solved questions like this before, however, this one proved rather hard so I put it into microsoft math and came out with these coordinates for the equations:

    2x+y=5
    (2,1) (4,-3)

    3x-y=10
    (1,-7) (2,-4)

    I tried to work it out like this:

    If 2x+y=5 then
    y=5-2x

    If:
    x=0 y=5

    x=1 y=3

    x=2 y=1

    x=3 y=-1
    ---------
    If 3x-y=10 then
    y=10-3x

    If:
    x=0 y=10

    x=1 y=7

    x=2 y=4

    x=3 y=1

    Is my working correct?

    I think it is, but it never hurts to make sure.

    Thanks in advance for your help!

    Drakmord
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  2. #2
    Junior Member
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  3. #3
    Newbie
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    Jul 2009
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    Thank you very much for your help Zarathustra!


    Drakmord
    Follow Math Help Forum on Facebook and Google+

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