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12x+7y=26
12x-3/2y=9
12x+7y=26
-17/2y=-17
y=-17/-17/2
y= -17×(-2/17)= 2
4x-1/2y=3
4x-1/2(2)=3
4x=4
x=1
12x+7y=26
12x-3/2y=9
12x+7y=26
-17/2y=-17
y=-17/-17/2
y= -17×(-2/17)= 2
4x-1/2y=3
4x-1/2(2)=3
4x=4
x=1