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t in (-oo:+oo)
(5/9)*(t+2) = (1/6)*(3*t-9) // - (1/6)*(3*t-9)
(5/9)*(t+2)-((1/6)*(3*t-9)) = 0
(5/9)*(t+2)+(-1/6)*(3*t-9) = 0
5/9*(t+2)-1/6*(3*t-9) = 0
5/9*(t+2)-1/6*(3*t-9) = 0
1/18*t+47/18 = 0
1/18*t+47/18 = 0
1/18*t+47/18 = 0 // - 47/18
1/18*t = -47/18 // : 1/18
t = -47/18/1/18
t = -47
t = -47
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