14. Вычисления: #173558
Найдите значение выражения:$$\frac{12}{7}:\Big(\frac{6}{7}-\frac{3}{4}\Big)$$
$$\frac{12}{7}:\Big(\frac{6}{7}-\frac{3}{4}\Big)=\frac{12}{7}:\Big(\frac{24}{28}-\frac{21}{28}\Big)$$$$\frac{12}{7}:\Big(\frac{24}{28}-\frac{21}{28}\Big)=\frac{12}{7}:\frac{3}{28}$$$$\frac{12}{7}:\frac{3}{28}=\frac{{}^{4}\cancel{12}}{7}\cdot\frac{28}{{}^{1}\cancel{3}}=16$$
20