- 4b + b + 4 = - 12
- 3b + 4 = -12
- 3b = -12 - 4
- 3b = -16
b = -16 : (-3)
b = 16/3
Проверка:
- 4 * ( - 16/3 ) + 16/3 + 4 = -12
-12 = -12
- 4b + b + 4 = - 12
- 3b + 4 = -12
- 3b = -12 - 4
- 3b = -16
b = -16 : (-3)
b = 16/3
Проверка:
- 4 * ( - 16/3 ) + 16/3 + 4 = -12
-12 = -12