Question

y+(8-3y) , 2x-(13-5x)+9 , 7y+(6-y)-11y Решите пожалуйста

Answer 1

y+(8-3y) =
y + 8 - 3y
-2y + 8
8 = 2y
4 = y


2x-(13-5x)+9 =
2x - 13 + 5x + 9
7x - 4
7x = 4
x = 4/7


7y+(6-y)-11y =
7y + 6 - y - 11y
- 5y + 6
6 = 5y
6/5 = y
1 1/5 = y