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x in (-oo:+oo)
(1/2)*x+3/2 = x-((1/2)*x)+9/2 // - x-((1/2)*x)+9/2
(1/2)*x-x+(1/2)*x+3/2-(9/2) = 0
(1/2)*x-x+(1/2)*x+3/2-9/2 = 0
-3 = 0
x belongs to the empty set
x belongs to the empty set
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