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x in (-oo:+oo)
((3*x+1)^1)/2+3 = x // - x
((3*x+1)^1)/2-x+3 = 0
(3*x+1)/2-x+3 = 0
(3*x+1)/2+(2*(-x))/2+(2*3)/2 = 0
3*x+2*(-x)+2*3+1 = 0
x+1+6 = 0
x+7 = 0
(x+7)/2 = 0
(x+7)/2 = 0 // * 2
x+7 = 0
x+7 = 0 // - 7
x = -7
x = -7
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