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x in (-oo:+oo)
(3*(x-1))/4 = 9*x // - 9*x
(3*(x-1))/4-(9*x) = 0
(3*(x-1))/4-9*x = 0
(3*(x-1))/4+(-9*4*x)/4 = 0
3*(x-1)-9*4*x = 0
-33*x-3 = 0
(-33*x-3)/4 = 0
(-33*x-3)/4 = 0 // * 4
-33*x-3 = 0
-33*x-3 = 0 // + 3
-33*x = 3 // : -33
x = 3/(-33)
x = -1/11
x = -1/11
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