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t in (-oo:+oo)
11 = 2*t+t+2 // - 2*t+t+2
11-(2*t)-t-2 = 0
11-2*t-t-2 = 0
9-3*t = 0 // - 9
-3*t = -9 // : -3
t = -9/(-3)
t = 3
t = 3
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