SOLUTION: How do you solve this for a system equation y= -x y= 2x

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Question 843419: How do you solve this for a system equation y= -x y= 2x
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
The first equation tells you that y = -x. Substitute -x for y in the second equation.


-x = 2x : add x to both sides


0 = 2x + x = 3x : Divide both sides by 3.


0=x : Substitute 0 for x in the first equation.


y = -0 = 0


Both x and y = 0.