SOLUTION: 9x+3y=27 12x-3y=36

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Question 183588: 9x+3y=27
12x-3y=36
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
9x+3y=27
12x-3y=36 add these 2 equations.
-------------------
21x=63
x=63/21
x=3 ans.
9*3+3y=27
27+3y=27
3y=27-27
3y=0
y=0 ans
Proof:
12*3-3*0=36
36=36