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x in (-oo:+oo)
x/8 = (x-6)/9 // - (x-6)/9
x/8-((x-6)/9) = 0
(-1*(x-6))/9+x/8 = 0
(-1*8*(x-6))/(8*9)+(9*x)/(8*9) = 0
9*x-1*8*(x-6) = 0
x+48 = 0
(x+48)/(8*9) = 0
(x+48)/(8*9) = 0 // * 8*9
x+48 = 0
x+48 = 0 // - 48
x = -48
x = -48
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