1 целая дробь 1/12 х поделить на 2 целых дробь 1/12=

1 1/12х : 2 1/12 = 2 3/5;

1 1/12х = 2 3/5 * 2 1/12;

1 1/12х = (2 * 5 + 3)/5 * (2 * 12 + 1)/12;

1 1/12х = (10 + 3)/5 * (24 + 1)/12;

1 1/12х = 13/5 * 25/12;

1 1/12х = (13 * 25)/(5 * 12);

1 1/12х = (13 * 5 * 5)/(5 * 12);

1 1/12х = (13 * 5)/12;

1 1/12х = 65/12;

1 1/12х = 5 5/12;

х = 5 5/12 : 1 1/12;

х = (5 * 12 + 5)/12 : (1 * 12 + 1)/12;

х = (60 + 5)/12 : (12 + 1)/12;

х = 65/12 : 13/12;

х = 65/12 * 12/13;

х = (65 * 12)/(12 * 13);

х = (13 * 5 * 12)/(12 * 13).

Уменьшили 12 и 13 в числителе и знаменателе.

х = 5.

Ответ: х = 5.