1) 3 11/15 ≤ х/15 ≤ 4
56/15 ≤ х/15 ≤ 60/15
х = 56; 57; 58; 59; 60.
2) 3 1/8 ≤ 25х ≤ 8 1/3
25/8 ≤ 25х ≤25/3
1/8 ≤ х ≤ 1/3
3/24 ≤ х ≤ 8/24
х = 3; 4; 5; 6; 7; 8.
1) 3 11/15 ≤ х/15 ≤ 4
56/15 ≤ х/15 ≤ 60/15
х = 56; 57; 58; 59; 60.
2) 3 1/8 ≤ 25х ≤ 8 1/3
25/8 ≤ 25х ≤25/3
1/8 ≤ х ≤ 1/3
3/24 ≤ х ≤ 8/24
х = 3; 4; 5; 6; 7; 8.