Question 281147
7x+8y=23 
3x-2y=-1 MULTIPLY BY 4 & ADD.
12X-8Y=-4
7X+8Y=23
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19X=19
X=19/19
X=1
7*1+8Y=23
7+8Y=23
8Y=23-7
8Y=16
Y=16/8
Y=2 ANS.
PROOF:
3*1-2*2=-1
3-4=-1
-1=-1