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Homework Help: Three Equations, Three Unknowns.

  1. Mar 7, 2010 #1
    1. The problem statement, all variables and given/known data

    But somehow not that simple..

    [tex]\frac{5xy}{x+y}[/tex] [tex]=6\left.[/tex]

    [tex]\frac{7yz}{y+z}[/tex] [tex]=10\left.[/tex]

    [tex]\frac{8zx}{z+x}[/tex] [tex]=15\left.[/tex]

    2. Relevant equations



    3. The attempt at a solution

    Tried and failed.
     
  2. jcsd
  3. Mar 7, 2010 #2

    epenguin

    User Avatar
    Homework Helper
    Gold Member

    Looks like if you turned the equations upside down you have something easy to solve.

    I think they want you to see that, although you could no doubt slog it out by cross multiplying and eliminating.
     
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