SOLUTION: If X2-Y2=28 and X-Y=8 then the average of X and Y is?

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Question 1016436: If X2-Y2=28 and X-Y=8 then the average of X and Y is?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
By inspection I can tell that x = 5 and y = -3.
Normally you would solve the second equation (x = y+8) and then
substitute into the first...
The average of the variables is 1.