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x in (-oo:+oo)
2*x-((9/2)*x)+16 = 0
2*x+(-9/2)*x+16 = 0
16-5/2*x = 0 // - 16
-5/2*x = -16 // : -5/2
x = -16/(-5/2)
x = 32/5
x = 32/5
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