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x in (-oo:+oo)
x = ((6*x-20)^1)/2-2 // - ((6*x-20)^1)/2-2
x-(((6*x-20)^1)/2)+2 = 0
x-((6*x-20)/2)+2 = 0
(-1*(6*x-20))/2+x+2 = 0
(-1*(6*x-20))/2+(2*x)/2+(2^2)/2 = 0
2*x-1*(6*x-20)+4 = 0
4-4*x+20 = 0
24-4*x = 0
(24-4*x)/2 = 0
(24-4*x)/2 = 0 // * 2
24-4*x = 0
24-4*x = 0 // - 24
-4*x = -24 // : -4
x = -24/(-4)
x = 6
x = 6
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