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t in (-oo:+oo)
16/9 = (4*t)/27 // - (4*t)/27
16/9-((4*t)/27) = 0
(-4/27)*t+16/9 = 0
16/9-4/27*t = 0 // - 16/9
-4/27*t = -16/9 // : -4/27
t = -16/9/(-4/27)
t = 12
t = 12
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