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x in (-oo:+oo)
8*x+4 = (5/2)*x-(3/2) // - (5/2)*x-(3/2)
8*x-((5/2)*x)+3/2+4 = 0
8*x+(-5/2)*x+3/2+4 = 0
11/2*x+11/2 = 0 // - 11/2
11/2*x = -11/2 // : 11/2
x = -11/2/11/2
x = -1
x = -1
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