SOLUTION: must solve using substitution -2x+y=6 y=3x+9

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Question 37701: must solve using substitution
-2x+y=6
y=3x+9
Answer by piglet162431(90) About Me  (Show Source):
You can put this solution on YOUR website!
-2x+3x+9=6
1x=-3
Now plug in
y=(3)(-3)+9
y=0
(-3,0)