6х=28-х
9х-26=30-5х
7-3х=6х-5.6
0.9×-7.4=-0.4×+4.3
5.8-1.6×=0.3х-1.8

6х=28-х
7х=28
х=4

9х-26=30-5х
14х=56
х=4

7-3х=6х-5.6
12.6=9х
х=1.4

0.9х-7.4=-0.4х+4.3
1.3х=11.7
х=9

5.8-1.6х=0.3х-1.8
7.6=1.9х
х=4