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x in (-oo:+oo)
(9/2)*x = (-1/2)*x-(8/5) // - (-1/2)*x-(8/5)
(9/2)*x-((-1/2)*x)+8/5 = 0
(9/2)*x+(1/2)*x+8/5 = 0
5*x+8/5 = 0 // - 8/5
5*x = -8/5 // : 5
x = -8/5/5
x = -8/25
x = -8/25
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