SOLUTION: Solve using the addition method. 2x+y=1 x-y=11

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Question 654529: Solve using the addition method.
2x+y=1
x-y=11
Answer by schmidtmomto6(24) About Me  (Show Source):
You can put this solution on YOUR website!
2x + y =1
x - y =11
_____________
3x + 0 =12
so x=4. Then substitute 4 for x back in one of te original equations:
2(4)+ y = 1
8+y=1
y= -7
Now stick this value for y back in the second equation,just to dbl check!
4-(-7)=11!!
=)That's it!