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T in (-oo:+oo)
T/5 = 2.9 // - 2.9
T/5-2.9 = 0
1/5*T-2.9 = 0 // + 2.9
1/5*T = 2.9 // : 1/5
T = 2.9/1/5
T = 14.5
T = 14.5
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