If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
t/0.27+1/(1/0.13) = 0
3.7037037*t+0.13 = 0 // - 0.13
3.7037037*t = -0.13 // : 3.7037037
t = -0.13/3.7037037
t = -0.0351
t = -0.0351
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