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