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x in (-oo:+oo)
(1/3)*(x-3) = 4*x-(3*(x-1))+28/3 // - 4*x-(3*(x-1))+28/3
(1/3)*(x-3)+3*(x-1)-(4*x)-(28/3) = 0
(1/3)*(x-3)+3*(x-1)-4*x-28/3 = 0
1/3*(x-3)+3*(x-1)-4*x-28/3 = 0
(1/3*3*(x-3))/3+(3^2*(x-1))/3+(-4*3*x)/3-28/3 = 0
1/3*3*(x-3)+3^2*(x-1)-4*3*x-28 = 0
10*x-12*x-28-12 = 0
-2*x-28-12 = 0
-2*x-40 = 0
(-2*x-40)/3 = 0
(-2*x-40)/3 = 0 // * 3
-2*x-40 = 0
-2*x-40 = 0 // + 40
-2*x = 40 // : -2
x = 40/(-2)
x = -20
x = -20
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