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t in (-oo:+oo)
t/0.12 = 0.5/0.3 // - 0.5/0.3
t/0.12-(0.5/0.3) = 0
t/0.12-1.66666667 = 0
8.33333333*t-1.66666667 = 0 // + 1.66666667
8.33333333*t = 1.66666667 // : 8.33333333
t = 1.66666667/8.33333333
t = 0.2
t = 0.2
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