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x in (-oo:+oo)
(x+3)/2 = 3*x-1 // - 3*x-1
(x+3)/2-(3*x)+1 = 0
(x+3)/2-3*x+1 = 0
(x+3)/2+(-3*2*x)/2+(1*2)/2 = 0
x-3*2*x+1*2+3 = 0
2-5*x+3 = 0
5-5*x = 0
(5-5*x)/2 = 0
(5-5*x)/2 = 0 // * 2
5-5*x = 0
5-5*x = 0 // - 5
-5*x = -5 // : -5
x = -5/(-5)
x = 1
x = 1
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