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t in (-oo:+oo)
-48 = 2*t+3*t+2 // - 2*t+3*t+2
-(2*t)-(3*t)-48-2 = 0
-2*t-3*t-48-2 = 0
-5*t-50 = 0 // + 50
-5*t = 50 // : -5
t = 50/(-5)
t = -10
t = -10
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