А) 24 * (2 3/4х - 1 5/6х) = 33
2 9/12х - 1 10/12х = 33 : 24
1 21/12х - 1 10/12х = 33/24
11/12х = 11/8
х = 11/8 : 11/12
х = 11/8 * 12/11
х = 12/8 = 3/2 = 1,5
б) 11/12х + 5 5/8 = 10 2/3
11/12х = 10 2/3 - 5 5/8
11/12х = 10 16/24 - 5 15/24
11/12х = 5 1/24
х = 5 1/24 : 11/12
х = 121/24 * 12/11
х = 11/2 = 5 1/2 = 5,5