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t in (-oo:+oo)
(t-4)/2 = (t+4)/3 // - (t+4)/3
(t-4)/2-((t+4)/3) = 0
(t-4)/2+(-1*(t+4))/3 = 0
(3*(t-4))/(2*3)+(-1*2*(t+4))/(2*3) = 0
3*(t-4)-1*2*(t+4) = 0
t-20 = 0
(t-20)/(2*3) = 0
(t-20)/(2*3) = 0 // * 2*3
t-20 = 0
t-20 = 0 // + 20
t = 20
t = 20
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