(3x + 7) * 2 = 32

Решение:

1. \( (3x + 7) \cdot 2 = 32 \)
2. \( 3x + 7 = \frac{32}{2} \)
3. \( 3x + 7 = 16 \)
4. \( 3x = 16 - 7 \)
5. \( 3x = 9 \)
6. \( x = \frac{9}{3} \)
7. \( x = 3 \)

Ответ: 3