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t in (-oo:+oo)
73/5 = 4*t-t-(2/5) // - 4*t-t-(2/5)
t-(4*t)+73/5+2/5 = 0
t-4*t+73/5+2/5 = 0
15-3*t = 0 // - 15
-3*t = -15 // : -3
t = -15/(-3)
t = 5
t = 5
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