SOLUTION: Im having a problem with the system of equations....for example x+y=11 y=-3x

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Question 6842: Im having a problem with the system of equations....for example x+y=11
y=-3x
Answer by prabhjyot(165) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=11 --->(1)
y=-3x --->(2)
Substituting equation (2) in equation (1) we get
x + (-3x) =11
x -3x =11
-2x =11
x = -11/2