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x in (-oo:+oo)
((9-x)^1)/2+2 = x-5 // - x-5
((9-x)^1)/2-x+2+5 = 0
(9-x)/2-x+2+5 = 0
(9-x)/2+(2*(-x))/2+(2^2)/2+(2*5)/2 = 0
2*(-x)-x+2*5+4+9 = 0
4-3*x+9+10 = 0
10-3*x+13 = 0
23-3*x = 0
(23-3*x)/2 = 0
(23-3*x)/2 = 0 // * 2
23-3*x = 0
23-3*x = 0 // - 23
-3*x = -23 // : -3
x = -23/(-3)
x = 23/3
x = 23/3
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