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x in (-oo:+oo)
(1/3)*(x-3) = 3*x-(2*(x-1))+7/3 // - 3*x-(2*(x-1))+7/3
(1/3)*(x-3)+2*(x-1)-(3*x)-(7/3) = 0
(1/3)*(x-3)+2*(x-1)-3*x-7/3 = 0
1/3*(x-3)+2*(x-1)-3*x-7/3 = 0
(1/3*3*(x-3))/3+(2*3*(x-1))/3+(-3*3*x)/3-7/3 = 0
1/3*3*(x-3)+2*3*(x-1)-3*3*x-7 = 0
7*x-9*x-9-7 = 0
-2*x-9-7 = 0
-2*x-16 = 0
(-2*x-16)/3 = 0
(-2*x-16)/3 = 0 // * 3
-2*x-16 = 0
-2*x-16 = 0 // + 16
-2*x = 16 // : -2
x = 16/(-2)
x = -8
x = -8
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