4x + 9 = 17
4x = 17 - 9
4x = 8 / : 4
x = 2
-3x - 25 = -5x - 3
-3x + 5x = -3 + 25
2x = 22 / : 2
x = 11
4x + 2 - 3x = 4 - 5x + 6
4x - 3x + 5x = 4 + 6 - 2
6x = 8 / : 6
x = 8/6
x = 4/3
4(2x - 1) + 3x = 6x + 5
8x - 4 + 3x = 6x + 5
8x + 3x - 6x = 5 + 4
5x = 9 / : 5
x = 1,8
(x + 2)(2x - 6) = 0
x + 2 = 0
2x - 6 = 0
x = 2
x = 3