101 13/15 : (11 - х) = 61,12
1528/15 : (11 - х) = 6112/100
11 - х = 1528/15 : 6112/100 = 1528/15 * 100/6112 = (1*20)/(3*4) = 20/12
11 - х = 1 8/12 = 1 2/3
х = 11 - 1 2/3 = 10 3/3 - 1 2/3 = 9 1/3
Проверка: 101 13/15 : (11 - 9 1/3) = 61,12
1528/15 : 1 2/3 = 61,12
1528/15 * 3/5 = 61,12
1528/25 = 61,12
61,12 = 61,12
Ответ: 9 целых 1/3.