SOLUTION: X+3y=6 2x+3y=18 solve by substitution

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Question 928740: X+3y=6 2x+3y=18 solve by substitution
Answer by rfer(16322) About Me  (Show Source):
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x=-3y+6
2x+3y=18
2(-3y+6)+3y=18
-6y+12+3y=18
-3y=18-12
y=6/-3
y=-2
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2x+3(-2)=18
2x-6=18
x=24/2
x=12
(12,-2)
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x+3y=6
12+3(-2)=6
6=6