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T in (-oo:+oo)
T/6.5 = 1.2/1.3 // - 1.2/1.3
T/6.5-(1.2/1.3) = 0
T/6.5-0.92307692 = 0
0.15384615*T-0.92307692 = 0 // + 0.92307692
0.15384615*T = 0.92307692 // : 0.15384615
T = 0.92307692/0.15384615
T = 6.00000013
T = 6.00000013
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