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x in (-oo:+oo)
(3/2)*x-x = (1/2)*x+4 // - (1/2)*x+4
(3/2)*x-x-((1/2)*x)-4 = 0
(3/2)*x-x+(-1/2)*x-4 = 0
-4 = 0
x belongs to the empty set
x belongs to the empty set
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