SOLUTION: solve by the elimination method. 7x-y=47 x+8y=23 what is the solution of the system? (type an ordered pair)

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Question 161115: solve by the elimination method.
7x-y=47
x+8y=23
what is the solution of the system?
(type an ordered pair)
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
7x-y=47 MULTIPLY THIS EQUATION BY 8 & ADD THEM.
x+8y=23
56X-8Y=376
-----------------------
57X-399
X=399/57
X=7 ANSWER.
7*7-Y=47
49-Y=47
-Y=47-49
-Y=-2
Y=2 ANSWER. OR (7,2)
PROOF:
7+8*2=23
7+16=23
23=23