29. 2x+3 / 5 = 7

Решение:

1. \[ \frac{2x+3}{5} = 7 \]
2. \[ 2x+3 = 7 \times 5 \]
3. \[ 2x+3 = 35 \]
4. \[ 2x = 35 - 3 \]
5. \[ 2x = 32 \]
6. \[ x = \frac{32}{2} \]
7. \[ x = 16 \]

Ответ: x = 16