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t in (-oo:+oo)
(2/3)*t-(1/2) = -23/54 // + -23/54
(2/3)*t-(1/2)-(-23/54) = 0
(2/3)*t-1/2+23/54 = 0
2/3*t-2/27 = 0 // + 2/27
2/3*t = 2/27 // : 2/3
t = 2/27/2/3
t = 1/9
t = 1/9
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