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t in (-oo:+oo)
(1/3)*(t+4) = 50 // - 50
(1/3)*(t+4)-50 = 0
1/3*(t+4)-50 = 0
1/3*(t+4)-50 = 0
1/3*t-146/3 = 0
1/3*t-146/3 = 0
1/3*t-146/3 = 0 // + 146/3
1/3*t = 146/3 // : 1/3
t = 146/3/1/3
t = 146
t = 146
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