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t in (-oo:+oo)
11-4 = (9/4)*t // - (9/4)*t
11-((9/4)*t)-4 = 0
(-9/4)*t-4+11 = 0
7-9/4*t = 0 // - 7
-9/4*t = -7 // : -9/4
t = -7/(-9/4)
t = 28/9
t = 28/9
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