SOLUTION: Solve the system by graphing. x – 2y = 8 x + y = -1

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Question 80779: Solve the system by graphing.
x – 2y = 8
x + y = -1



Answer by daniellagirl89(3) About Me  (Show Source):
You can put this solution on YOUR website!
x – 2y = 8
x + y = -1
Multiply the second equation by 2 to get both y's opposite of eachother
2(x + y) = -1(2)
2x + 2y = -2
Now plug in your first equation
x - 2y = 8
2x + 2y = -2
3x = 6
x = 2