SOLUTION: the sum of two real numbers is nine. their difference is one. what are the numbers?

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Question 309157: the sum of two real numbers is nine. their difference is one. what are the numbers?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
x%2By=9
x-y=1
i can guess the answer to be x=5 and y=4
but to show work
x=9-y
%289-y%29-y=1
-2y=-8
y=4
x=9-%284%29
x=5