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t in (-oo:+oo)
14/18 = t/27 // - t/27
14/18-(t/27) = 0
7/9-1/27*t = 0 // - 7/9
-1/27*t = -7/9 // : -1/27
t = -7/9/(-1/27)
t = 21
t = 21
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