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t in (-oo:+oo)
t+2 = 3*t-2 // - 3*t-2
t-(3*t)+2+2 = 0
t-3*t+2+2 = 0
4-2*t = 0 // - 4
-2*t = -4 // : -2
t = -4/(-2)
t = 2
t = 2
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