4х + 17 = 3(2х - 5) + 9
4х + 17 = 6х - 15 + 9
4х - 6х = -17 - 15 + 9
-2х = -2 + 9
-2х = 7
х = 7 : 2
х = -3,5
4х + 17 = 3(2х - 5) + 9
4х + 17 = 6х - 15 + 9
4х - 6х = -17 - 15 + 9
-2х = -2 + 9
-2х = 7
х = 7 : 2
х = -3,5