Question 161115
7x-y=47 MULTIPLY THIS EQUATION BY 8 & ADD THEM.
x+8y=23
56X-8Y=376
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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