2*(х - 3) = 4(5 - х)
2х - 6 = 20 - 4х
2х + 4х = 20 + 6
6х = 26
х = 4 2/6 = 4 1/3
х = 4 1/3
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4х - 5 * (х + 1) = 6 - 2х
4х - 5х - 5 = 6 - 2х
-1х + 2х = 6 + 5
х = 11
------------------------------------
7х - 16 = - 3(х +1)
7х - 16 = - 3х - 3
7х + 3х = 16 - 3
10х = 13
х = 13/10
х = 1 3/10