№4. Решите уравнение: a) $$\frac{16}{51}$$x=4$$\frac{11}{34}$$ б) 3$$\frac{1}{9}$$y +$$\frac{5}{9}$$y =7,2

a) $$\frac{16}{51}$$x=4$$\frac{11}{34}$$ =$$\frac{147}{34}$$
ewlinex =$$\frac{147}{34}:\frac{16}{51}$$=
ewlinex =$$\frac{147}{34} \cdot \frac{51}{16}$$=
ewlinex =$$\frac{147 \cdot 3}{32}$$=
ewlinex =$$\frac{441}{32}$$= 13$$\frac{25}{32}$$

б) 3$$\frac{1}{9}$$y +$$\frac{5}{9}$$y =7,2

$$\frac{28}{9}$$y +$$\frac{5}{9}$$y =$$\frac{72}{10}$$

$$\frac{33}{9}$$y =$$\frac{72}{10}$$

y =$$\frac{72}{10}:\frac{33}{9}$$=
ewliny =$$\frac{72}{10} \cdot \frac{9}{33}$$=
ewliny =$$\frac{8}{10} \cdot \frac{9}{1}$$=
ewliny =$$\frac{4}{5} \cdot 3 = \frac{12}{5}$$= 2$$\frac{2}{5}$$= 2,4

Ответ: a) 13$$\frac{25}{32}$$; б) 2,4