Решите (6 1/7- 5 3/4) : 11/14+ (3 3/4- 1 5/6) : 1/6

Решите задачу:

$1)(6 \frac{1}{7} -5 \frac{3}{4} ): \frac{11}{14} +(3 \frac{3}{4} -1 \frac{5}{6} ): \frac{1}{6} = 12\\ \\ 1) 6 \frac{1}{7} -5 \frac{3}{4} =6 \frac{4}{28} -5 \frac{21}{28} =5 \frac{32}{28} -5 \frac{21}{28} = \frac{11}{28} \\ \\ 2) 3 \frac{3}{4} -1 \frac{5}{6}=3 \frac{9}{12} -1 \frac{10}{12} =2 \frac{21}{12} - 1\frac{10}{12} =1 \frac{11}{12} = \frac{23}{12} \\ \\ 3) \frac{11}{28} * \frac{14}{11} = \frac{1}{2} =0.5 \\ \\ 4) \frac{23*6}{12} = \frac{23}{2} =11.5\\ \\ 5) 0.5+11.5=12$