Вычислите: 8. $$ (-\frac{7}{12} + \frac{5}{6}) : (-\frac{5}{6}) $$

Решение: $$ (-\frac{7}{12} + \frac{5}{6}) : (-\frac{5}{6}) = (-\frac{7}{12} + \frac{10}{12}) : (-\frac{5}{6}) = \frac{3}{12} : (-\frac{5}{6}) = \frac{1}{4} * (-\frac{6}{5}) = -\frac{6}{20} = -\frac{3}{10} $$ Ответ: $$ -\frac{3}{10} $$