2.Решите уравнения: а) 15 - z=10; 6)=+.

a) $$15\frac{4}{9} - z = 10\frac{5}{12}$$

$$z = 15\frac{4}{9} - 10\frac{5}{12}$$

$$z = 15\frac{16}{36} - 10\frac{15}{36}$$

$$z = 5\frac{1}{36}$$

б) $$ \frac{5}{6}m = \frac{5}{18} + \frac{1}{2}$$

$$\frac{5}{6}m = \frac{5}{18} + \frac{9}{18}$$

$$\frac{5}{6}m = \frac{14}{18}$$

$$\frac{5}{6}m = \frac{7}{9}$$

$$m = \frac{7}{9} : \frac{5}{6}$$

$$m = \frac{7}{9} \cdot \frac{6}{5}$$

$$m = \frac{7 \cdot 2}{3 \cdot 5}$$

$$m = \frac{14}{15}$$

Ответ: а) $$z = 5\frac{1}{36}$$; б) $$m = \frac{14}{15}$$