SOLUTION: x + y = 2 2x-y = 7

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Question 260442: x + y = 2
2x-y = 7
Found 2 solutions by richwmiller, dabanfield:
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
add them and get 3x=9
x=3
BTW x-1=2
x=3 not 1 nor -1

Answer by dabanfield(803) About Me  (Show Source):
You can put this solution on YOUR website!
1.) x + y = 2
2.) 2x-y = 7
From 1.) we know that x = 2 - y
Substituting 2 - y for x in equation 2.) we have:
2*(2-y) - y = 7
Solve the above for y:
4-2y - y = 7
-3y = 3
y = -1
Now substitute -1 for y in equation 1.):
x + (-1) = 2
x - 1 = 2
x = 1