a)(x+)-2=1; б) 4,625-(3-x)=1.

а) $$\left(x + \frac{8}{9}\right) - 2\frac{13}{18} = 1\frac{5}{6}$$

$$x + \frac{8}{9} = 1\frac{5}{6} + 2\frac{13}{18}$$

$$x + \frac{8}{9} = 1\frac{15}{18} + 2\frac{13}{18}$$

$$x + \frac{8}{9} = 3\frac{28}{18}$$

$$x + \frac{8}{9} = 3 + 1\frac{10}{18}$$

$$x + \frac{8}{9} = 4\frac{5}{9}$$

$$x = 4\frac{5}{9} - \frac{8}{9}$$

$$x = 3\frac{14}{9} - \frac{8}{9}$$

$$x = 3\frac{6}{9}$$

$$x = 3\frac{2}{3}$$

б) $$4,625 - \left(3\frac{1}{12} - x\right) = 1\frac{23}{24}$$

$$4,625 - 3\frac{1}{12} + x = 1\frac{23}{24}$$

$$4\frac{5}{8} - 3\frac{1}{12} + x = 1\frac{23}{24}$$

$$4\frac{15}{24} - 3\frac{2}{24} + x = 1\frac{23}{24}$$

$$1\frac{13}{24} + x = 1\frac{23}{24}$$

$$x = 1\frac{23}{24} - 1\frac{13}{24}$$

$$x = \frac{10}{24}$$

$$x = \frac{5}{12}$$

Ответ:

• $$x = 3\frac{2}{3}$$
• $$x = \frac{5}{12}$$