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Math Help - Fractions help

  1. #1
    Newbie
    Joined
    Apr 2007
    Posts
    15

    Fractions help

    Hi, I need help on the following problem:

    If  \frac{(2y+2z-x)}{a} = \frac{(2z+2x-y)}{b} = \frac{(2x+2y-z)}{c} show that:   \frac{x}{(2b+2c-a)} = \frac{y}{(2c+2a-b)} = \frac{z}{(2a+2b-c)}

    Any hints will help, thanks.
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  2. #2
    Junior Member
    Joined
    Sep 2008
    Posts
    34
    I think you've to repeatedly use "componendo et dividendo" i.e.
    if a/b = c/d then (a+b)/(a-b) = (c+d)/(c-d)
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