SOLUTION: -x+y=7 X+y=5 The solution system is?

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Question 1019797: -x+y=7
X+y=5
The solution system is?
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.
-x+y=7
X+y=5
The solution system is?
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Add the two equation, and then . . .

Then you will get an idea what to do next . . . .

And next . . . .