222. Решите уравнение: a) 80-2=3; 6) y-4=2; 11 9 11 B) 816-x-217-8- 5 8-(x-2)=8. 27 27 27

а) $$8\frac{8}{11}-z=3\frac{9}{11}$$

$$z=8\frac{8}{11}-3\frac{9}{11}$$

$$z=8-3+\frac{8}{11}-\frac{9}{11}$$

$$z=5-\frac{1}{11}$$

$$z=4+1-\frac{1}{11}$$

$$z=4+\frac{11}{11}-\frac{1}{11}$$

$$z=4\frac{10}{11}$$

б) $$y-4\frac{3}{5}=2\frac{4}{5}$$

$$y=2\frac{4}{5}+4\frac{3}{5}$$

$$y=2+4+\frac{4}{5}+\frac{3}{5}$$

$$y=6+\frac{7}{5}$$

$$y=6+\frac{5+2}{5}$$

$$y=6+1+\frac{2}{5}$$

$$y=7\frac{2}{5}$$

в) $$8\frac{16}{27}-(x-2\frac{17}{27})=8\frac{5}{27}$$

$$x-2\frac{17}{27}=8\frac{16}{27}-8\frac{5}{27}$$

$$x-2\frac{17}{27}=8-8+\frac{16}{27}-\frac{5}{27}$$

$$x-2\frac{17}{27}=\frac{11}{27}$$

$$x=\frac{11}{27}+2\frac{17}{27}$$

$$x=2+\frac{11}{27}+\frac{17}{27}$$

$$x=2+\frac{28}{27}$$

$$x=2+\frac{27+1}{27}$$

$$x=2+1+\frac{1}{27}$$

$$x=3\frac{1}{27}$$

Ответ: а) $$4\frac{10}{11}$$, б) $$7\frac{2}{5}$$, в) $$3\frac{1}{27}$$