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x in (-oo:+oo)
9/8 = (x+6)/6 // - (x+6)/6
9/8-((x+6)/6) = 0
(-1*(x+6))/6+9/8 = 0
(-1*8*(x+6))/(6*8)+(6*9)/(6*8) = 0
6*9-1*8*(x+6) = 0
6-8*x = 0
(6-8*x)/(6*8) = 0
(6-8*x)/(6*8) = 0 // * 6*8
6-8*x = 0
6-8*x = 0 // - 6
-8*x = -6 // : -8
x = -6/(-8)
x = 3/4
x = 3/4
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