4х = 24 - х
4х + х = 24
5х = 24
х = 4,8
-----------------------
8х - 8 = 20 - 6х
8х + 6х = 20 + 8
14х = 28
х = 2
------------------------
9 - 4х = 3х - 40
-4х - 3х = -40 - 9
-7х = - 49
х = 7
------------------------
5/6х + 16 = 4/9х + 9
5/6х - 4/9х = - 16 + 9
15/18х - 8/18х = - 7
7/18х = - 7
х = - 7 : 7/18
х = - 18
-----------------------
4(х - 3) = х + 6
4х - 12 = х + 6
4х - х = 12 + 6
3х = 18
х = 6
---------------------
4 - 6(х + 2) = 3 - 5х
4 - 6х - 12 = 3 - 5х
- 6х + 5х = -4 +12 + 3
- х = 11
х = - 11