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x in (-oo:+oo)
(3/2)*x+1/2 = x-((1/2)*x)+9/2 // - x-((1/2)*x)+9/2
(3/2)*x-x+(1/2)*x+1/2-(9/2) = 0
(3/2)*x-x+(1/2)*x+1/2-9/2 = 0
x-4 = 0 // + 4
x = 4
x = 4
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