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Y in (-oo:+oo)
Y+(5/2)*Y = 10 // - 10
Y+(5/2)*Y-10 = 0
7/2*Y-10 = 0 // + 10
7/2*Y = 10 // : 7/2
Y = 10/7/2
Y = 20/7
Y = 20/7
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