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t in (-oo:+oo)
t/(-17.7) = 12.7 // - 12.7
t/(-17.7)-12.7 = 0
-0.05649718*t-12.7 = 0 // + 12.7
-0.05649718*t = 12.7 // : -0.05649718
t = 12.7/(-0.05649718)
t = -224.78998067
t = -224.78998067
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