помогите с математикой!!!!номер 912

1) 2x - 5 = 0
2x = 5
x = 2,5

2) 4x - 3 = 0
4x = 3
x = 0,75

3) 2 - 3x = 0
3x = 2
x = 2/3

4) 4 - 5x = 0
5x = 4
x = 0,8

5) |3x + 1| + 8 = 8
|3x + 1| = 0
3x + 1 = 0
3x = 1
x = 1/3

6) |9x + 2| - 27 = -27
|9x + 2| = 0
9x + 2 = 0
9x = -2
x = -2/9