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t in (-oo:+oo)
86/55 = 5*t-2*t+1/5 // - 5*t-2*t+1/5
86/55-(-2*t)-(5*t)-(1/5) = 0
2*t-5*t+86/55-1/5 = 0
15/11-3*t = 0 // - 15/11
-3*t = -15/11 // : -3
t = -15/11/(-3)
t = 5/11
t = 5/11
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