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x in (-oo:+oo)
((4*X-12)^1)/2+3 = x // - x
((4*X-12)^1)/2-x+3 = 0
(4*X-12)/2-x+3 = 0
(4*X-12)/2+(2*(-x))/2+(2*3)/2 = 0
4*X+2*(-x)+2*3-12 = 0
4*X-2*x-12+6 = 0
4*X-2*x-6 = 0
(4*X-2*x-6)/2 = 0
(4*X-2*x-6)/2 = 0 // * 2
4*X-2*x-6 = 0
4*X-2*x-6 = 0 // - 4*X-6
-2*x = -(4*X-6) // : -2
x = (-(4*X-6))/(-2)
x = (6-(4*X))/(-2)
x = (6-(4*X))/(-2)
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