211.
х 3х - 2
--- - -------- = 3
2 4
2х 3х - 2
--- - ---------- = 3
4 4
(-х-2) : 4 = 3
-х - 2 = 3 * 4
-х - 2 = 12
- х = 12 + 2
-х = 14
х = 14 : - 1
х = - 14
212.
2х - 1 х + 1
--------- + ---------- = 2
3 2
2 * (2х -1) 3 * (х + 1)
------------- + --------------- = 2
6 6
4х - 2 + 3х + 3
------------------ = 2
6
7х + 1 = 2 * 6
7х + 1 = 12
7х = 12 - 1
7х = 11
х = 11/7
213.
х - 1 х
------ - ---- = 1
3 4
4 * (х - 1) - 3х
------------------- = 1
12
4х - 4 - 3х = 12
х - 4 = 12
х = 12 + 4
х = 16