4 + 8y + 8 = 2y - (10 + 7y) + 9
Combine like terms:8y + 12 = -5y - 1
Add 5y to both sides:13y + 12 = -1
Subtract 12 from both sides:13y = -13
Divide by 13:y = -1
Ответ: y = -1
4 + 8y + 8 = 2y - (10 + 7y) + 9
Combine like terms:
8y + 12 = -5y - 1
Add 5y to both sides:
13y + 12 = -1
Subtract 12 from both sides:
13y = -13
Divide by 13:
y = -1
Ответ: y = -1