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x in (-oo:+oo)
(x-1)/3-((x-1)/2) = 6 // - 6
(x-1)/3-((x-1)/2)-6 = 0
(x-1)/3+(-1*(x-1))/2-6 = 0
(2*(x-1))/(2*3)+(-1*3*(x-1))/(2*3)+(-6*2*3)/(2*3) = 0
2*(x-1)-1*3*(x-1)-6*2*3 = 0
1-x-36 = 0
-x-35 = 0
(-x-35)/(2*3) = 0
(-x-35)/(2*3) = 0 // * 2*3
-x-35 = 0
-x-35 = 0 // + 35
-x = 35 // * -1
x = -35
x = -35
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