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x in (-oo:+oo)
(11/2)*x = (1/2)*x-5 // - (1/2)*x-5
(11/2)*x-((1/2)*x)+5 = 0
(11/2)*x+(-1/2)*x+5 = 0
5*x+5 = 0 // - 5
5*x = -5 // : 5
x = -5/5
x = -1
x = -1
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