nevredimaya

Verified answer

1/3х+1/2х=3,75
5/6х=3,75
х=3,75:5/6
х=4,5

3/5х-0,25х=4,9
0,6х-0,25х=4,9
0,35х=4,9
х=4,9:0,35
х=14

7/8х-0,2х=8,1
7/8х-1/5х=8,1
27/40х=8,1
х=8,1:27/40
х=12