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t in (-oo:+oo)
6*t-4*t-(9/10) = 81/110 // - 81/110
6*t-4*t-(9/10)-(81/110) = 0
6*t-4*t-9/10-81/110 = 0
2*t-18/11 = 0 // + 18/11
2*t = 18/11 // : 2
t = 18/11/2
t = 9/11
t = 9/11
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