1. 6целых1/24 2. 6целых 19/60 3. 10целых 20/21 4.2целых 8/60
Log(2)14x=log(2)7*4=log(2)28
14x=28
x=2
1 3/23(8 2/3-3/4*х)=4 5/23
8 2/3-3/4*х=4 5/23:1 3/23
8 2/3-3/4*х=97/23:26/23
8 2/3-3/4*х=97/26
3/4*х=8 2/3-3 19/26
3/4*х=8 52/78-3 57/78
3/4*х=7 130/78-3 57/78
3/4*х=4 73/78
х=4 73/78:3/4
х=385/78:3/4
х=770/117
х=6 68/117
Уверен в правильности условий?