2) $$y + 6\frac{1}{8} = 8\frac{5}{8}$$

$$y + 6\frac{1}{8} = 8\frac{5}{8}$$ $$y = 8\frac{5}{8} - 6\frac{1}{8}$$ $$y = \frac{8*8+5}{8} - \frac{6*8+1}{8} = \frac{69}{8} - \frac{49}{8} = \frac{69-49}{8} = \frac{20}{8} = \frac{5}{2} = 2\frac{1}{2}$$ Ответ: $$2\frac{1}{2}$$