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t in (-oo:+oo)
7.4 = -t/8.5 // + -t/8.5
7.4-(-t/8.5) = 0
0.11764706*t+7.4 = 0
0.11764706*t+7.4 = 0 // - 7.4
0.11764706*t = -7.4 // : 0.11764706
t = -7.4/0.11764706
t = -62.89999937
t = -62.89999937
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