SOLUTION: what is the solution set of x + y = 0 x - y + 2 = 0

Algebra ->  Graphs -> SOLUTION: what is the solution set of x + y = 0 x - y + 2 = 0       Log On


   

Question 695140: what is the solution set of
x + y = 0
x - y + 2 = 0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
what is the solution set of
x + y = 0
x - y + 2 = 0
-----
x + y = 0
x - y = -2
----
Add and solve for "x":
2x = -2
x = -1
-------
Solve for "y":
x + y = 0
-1 + y = 0
y = 1
-----
Solution: (-1,1)
====================
Cheers,
Stan H.
==================