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x in (-oo:+oo)
(1/3)*x+3 = (6*x+11)/6 // - (6*x+11)/6
(1/3)*x-((6*x+11)/6)+3 = 0
(-1*(6*x+11))/6+x/3+3 = 0
(-1*3*(6*x+11))/(3*6)+(6*x)/(3*6)+(6*3^2)/(3*6) = 0
6*x-1*3*(6*x+11)+6*3^2 = 0
54-12*x-33 = 0
21-12*x = 0
(21-12*x)/(3*6) = 0
(21-12*x)/(3*6) = 0 // * 3*6
21-12*x = 0
21-12*x = 0 // - 21
-12*x = -21 // : -12
x = -21/(-12)
x = 7/4
x = 7/4
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