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x in (-oo:+oo)
((-2*x-5)^1)/2-5 = 2*x // - 2*x
((-2*x-5)^1)/2-(2*x)-5 = 0
(-2*x-5)/2-2*x-5 = 0
(-2*x-5)/2+(-2*2*x)/2+(-5*2)/2 = 0
-2*x-2*2*x-5*2-5 = 0
-6*x-10-5 = 0
-6*x-15 = 0
(-6*x-15)/2 = 0
(-6*x-15)/2 = 0 // * 2
-6*x-15 = 0
-6*x-15 = 0 // + 15
-6*x = 15 // : -6
x = 15/(-6)
x = -5/2
x = -5/2
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