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x in (-oo:+oo)
(3*x-1)/9+x = 3*x+1/3+4 // - 3*x+1/3+4
(3*x-1)/9+x-(3*x)-(1/3)-4 = 0
(3*x-1)/9+x-3*x-1/3-4 = 0
(3*(3*x-1))/(3*9)+(3*9*x)/(3*9)+(-3*3*9*x)/(3*9)+(-1*9)/(3*9)+(-4*3*9)/(3*9) = 0
3*(3*x-1)+3*9*x-3*3*9*x-1*9-4*3*9 = 0
36*x-81*x-108-9-3 = 0
-45*x-108-9-3 = 0
-45*x-108-12 = 0
-45*x-120 = 0
(-45*x-120)/(3*9) = 0
(-45*x-120)/(3*9) = 0 // * 3*9
-45*x-120 = 0
-45*x-120 = 0 // + 120
-45*x = 120 // : -45
x = 120/(-45)
x = -8/3
x = -8/3
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