Question 896719: What is the value of x+y/y-x if x=m+n/m-n and y=m-n/m+n ?
Answer by KMST(5328)   (Show Source):
You can put this solution on YOUR website! This is a weird question, and I feel there is a trick, or a misunderstanding or typos.
x+y/y-x = =x+1-x=1
That is what you wrote based on the universally agreed upon order of operations convention, but probably that is not what you meant to ask.
You probably meant to ask about the value of
(x+y)/(y-x) =
when
 and 
If you are typing on one line of text, you need those parentheses.
With and ,
it is clear that  <---> ,
and substituting gives you
That can be written in other forms,
either based on  , or based on  and  .
You could even have used <---> to substitute into  ,
and we would have ended with an expression based on  .
Any way, you do not end with a constant value.
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