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t in (-oo:+oo)
3-(6*t)-(2*t) = 19 // - 19
3-(6*t)-(2*t)-19 = 0
3-6*t-2*t-19 = 0
-8*t-16 = 0 // + 16
-8*t = 16 // : -8
t = 16/(-8)
t = -2
t = -2
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