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t in (-oo:+oo)
8-3*t-(3*t) = 2 // - 2
8-3*t-(3*t)-2 = 0
8-3*t-3*t-2 = 0
6-6*t = 0 // - 6
-6*t = -6 // : -6
t = -6/(-6)
t = 1
t = 1
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