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Formulation of equation

  1. Nov 12, 2007 #1
    I have z=f(x,y) also z=g(x,y). How do I combine these two expressions. Help me out
  2. jcsd
  3. Nov 13, 2007 #2


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    Science Advisor

    "Things both equal to a third thing are equal to each other".

    If z= f(x,y) and z= g(x,y) then f(x,y)= g(x,y)!
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