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t in (-oo:+oo)
-3*t = -27/11 // + -27/11
-3*t-(-27/11) = 0
27/11-3*t = 0
27/11-3*t = 0 // - 27/11
-3*t = -27/11 // : -3
t = -27/11/(-3)
t = 9/11
t = 9/11
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