x+1/7x=16

Решение:

1. \[ x + \frac{1}{7}x = 16 \]
2. \[ \frac{7}{7}x + \frac{1}{7}x = 16 \]
3. \[ \frac{8}{7}x = 16 \]
4. \[ x = 16 \cdot \frac{7}{8} \]
5. \[ x = 2 \cdot 7 \]
6. \[ x = 14 \]

Ответ: 14