SOLUTION: If 2x + y = 12 and x + 2y = -6 what is the value of 2x + 2y?

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Question 93352: If 2x + y = 12 and x + 2y = -6 what is the value of 2x + 2y?
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
2X+Y=12 NOW MULTIPLY THE SECOND EQUATION BY -2 & ADD THEM:
-2X-4Y=12
--------------------------------
-3Y=24
Y=24/-3
Y=-8 ANSWER.
2X-8=12
2X=12+8
X=20/2
X=10 ANSWER.
SO 2X+2Y=2*10+2*-8=20-16=4