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x in (-oo:+oo)
(1/2)*x-(2*x)-16 = 0
(1/2)*x-2*x-16 = 0
-3/2*x-16 = 0 // + 16
-3/2*x = 16 // : -3/2
x = 16/(-3/2)
x = -32/3
x = -32/3
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