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Math Help - elimination method - need help

  1. #1
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    elimination method - need help

    solve by elimination method

    1/2 x + 1/4 y = 1/3
    2/3 x - 2/5 y = 1/5
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  2. #2
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    Hey,

    this is a little bit nasty!

    What I would do is multiply the second equation by 3/4, making the coefficients of the x-terms the same. The take one equation from the other which will give you an expression in y only. find y, then sub this value of y into one of the first equations to get x. Then you're done.
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  3. #3
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    thats what I tried doing and I'm getting x= 10/9 and y= -9/15 but when I plug it in to check, it isn't right?
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  4. #4
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    Hi,

    You can turn the 2 equations into the following form:

    10x-6y=3
    12x+6y=8

    Add these together, and you get x then y follows.

    I agree - your answer isn't right!
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