д) $$5\frac{25}{36} - t = 1\frac{1}{12} + 2\frac{3}{8}$$;

д) $$5\frac{25}{36} - t = 1\frac{1}{12} + 2\frac{3}{8}$$; $$5\frac{25}{36} - t = 1\frac{2}{24} + 2\frac{9}{24}$$; $$5\frac{25}{36} - t = 3\frac{11}{24}$$; $$t = 5\frac{25}{36} - 3\frac{11}{24} = 5\frac{50}{72} - 3\frac{33}{72} = 2\frac{17}{72}$$. \textbf{Ответ: } $$t = 2\frac{17}{72}$$