SOLUTION: For which value of K the system of equations x+y=2 and x-y=K has an unique solution?

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Question 1085818: For which value of K the system of equations x+y=2 and x-y=K has an unique solution?
Answer by ikleyn(52848) About Me  (Show Source):
You can put this solution on YOUR website!
.
For ANY value of K.