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Math Help - Linear simultaneous equations help please ;O

  1. #1
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    Linear simultaneous equations help please ;O

    Heya!

    I need help in how to do this equation. I need to find both x and y.

    I tried to multiply the top line with -2, then add both of the lines up, (which would cancel out the -6 and 6: so I'm left with the y's), but I end up with this negative, decimal answer, after working everything out. It doesn't seem right.

    So could you guys help me solve it? Thanks! =]

    3x + 2y = 22
    6x + 5y = 46
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  2. #2
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    Quote Originally Posted by Hikaru View Post
    Heya!

    I need help in how to do this equation. I need to find both x and y.

    I tried to multiply the top line with -2, then add both of the lines up, (which would cancel out the -6 and 6: so I'm left with the y's), but I end up with this negative, decimal answer, after working everything out. It doesn't seem right.

    So could you guys help me solve it? Thanks! =]

    3x + 2y = 22 => -6x - 4y = -44 .... (1)

    6x + 5y = 46 .... (2)
    Mr F. edit in red.

    (1) + (2): -6x - 4y + 6x + 5y = -44 + 46 => y = 2.

    No problem from where I'm looking at it ......
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