6) 92 + 56 : (14 - b) = 100

Решение:

1. \[ 92 + 56 : (14 - b) = 100 \]
2. \[ 56 : (14 - b) = 100 - 92 \]
3. \[ 56 : (14 - b) = 8 \]
4. \[ 14 - b = 56 : 8 \]
5. \[ 14 - b = 7 \]
6. \[ -b = 7 - 14 \]
7. \[ -b = -7 \]
8. \[ b = 7 \]

Ответ: b = 7