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r in (-oo:+oo)
7496 = (0.08*r)/7400 // - (0.08*r)/7400
7496-((0.08*r)/7400) = 0
7496-0.00001081*r = 0
7496-0.00001081*r = 0 // - 7496
-0.00001081*r = -7496 // : -0.00001081
r = -7496/(-0.00001081)
r = 693432007.40055504
r = 693432007.40055504
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