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x in (-oo:+oo)
x-((3/2)*x)-8 = 0
x+(-3/2)*x-8 = 0
-1/2*x-8 = 0 // + 8
-1/2*x = 8 // : -1/2
x = 8/(-1/2)
x = -16
x = -16
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