7 - 2X = 9 - 3X
2X - 3X = 7 - 9
- X = - 2
X = 2
------------------
11X = 6 + 10X - 5
11X - 10X = 1
X = 1
------------------
12X - 18 - 3X = 2X - 4
9X - 2X = - 4 + 18
7X = 14
X = 2
------------------
12X + 20 - 20X + 15 = 3
- 8X = 3 - 35
- 8X = - 32
X = 4
--------------------
5X - 12X + 3 = 7 - 14X - 4
- 7X + 14X = 3 - 3
7X = 0
X = 0
---------------------
- 5,6X + 16,8 + 2,1X = - 3,5X + 10
- 3,5X + 3,5X = 10 - 16,8
0X = - 6,8
Нет решений