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x in (-oo:+oo)
(x-1)/12 = (3*x-17)/8 // - (3*x-17)/8
(x-1)/12-((3*x-17)/8) = 0
(x-1)/12+(-1*(3*x-17))/8 = 0
(8*(x-1))/(8*12)+(-1*12*(3*x-17))/(8*12) = 0
8*(x-1)-1*12*(3*x-17) = 0
196-28*x = 0
(196-28*x)/(8*12) = 0
(196-28*x)/(8*12) = 0 // * 8*12
196-28*x = 0
196-28*x = 0 // - 196
-28*x = -196 // : -28
x = -196/(-28)
x = 7
x = 7
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