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t in (-oo:+oo)
2/9 = t/54 // - t/54
2/9-(t/54) = 0
2/9-1/54*t = 0 // - 2/9
-1/54*t = -2/9 // : -1/54
t = -2/9/(-1/54)
t = 12
t = 12
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