SOLUTION: 2x-y=-3 x+y=12

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Question 1029419: 2x-y=-3
x+y=12
Found 2 solutions by Fombitz, Boreal:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add the equations together to eliminate y.
2x-y%2Bx%2By=-3%2B12
3x=9
Solve for x.
Then use either equation to solve for y.

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
2x-y=3
x+y=12
add them and the y's disappear
3x=15
x=5
substitute in the second
5+y=12
y=7
(5,7)
Check with the other equaion
2(5)-7=3