6)5 3 169 + у - у при у

б) $$\frac{5}{16}y + y - \frac{3}{8}y$$ при $$y = 1\frac{1}{15};$$

$$\frac{5}{16}y + y - \frac{3}{8}y = \frac{5}{16}y + \frac{16}{16}y - \frac{3 \cdot 2}{8 \cdot 2}y = \frac{5}{16}y + \frac{16}{16}y - \frac{6}{16}y = \frac{15}{16}y$$

$$\frac{15}{16} \cdot 1\frac{1}{15} = \frac{15}{16} \cdot \frac{16}{15} = 1$$

Ответ: 1