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x in (-oo:+oo)
(1/2)*x+2 = (3/4)*x-8 // - (3/4)*x-8
(1/2)*x-((3/4)*x)+2+8 = 0
(1/2)*x+(-3/4)*x+2+8 = 0
10-1/4*x = 0 // - 10
-1/4*x = -10 // : -1/4
x = -10/(-1/4)
x = 40
x = 40
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