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