Question

помогите решить за 2 приклади по 3 и по 2 другому дам 90 балов пж срочно​

Answer 1

Пошаговое объяснение:

№2

1) 4 5/12 - 3 13/24 = 4 10/24 - 3 13/24 = 3 34/24 - 3 13/24 = 21/24 = 7/8

2) 7/8 : 1 3/4 = 7/8 : 7/4 = 7/8 * 4/7 = 1/2 * 1/1 = 1/2

3) 5/6 : 5/7 = 5/6 * 7/5 = 1/6 * 7/1 = 7/6 = 1 1/6

4) 1/2 + 1 1/6 = 3/6 + 1 1/6 = 1 4/6 = 1 2/3

№3

1/4х + 1/6х + 1/8х = 39/56

6/24х + 4/24х + 3/24х = 39/56

13/24х = 39/56

х = 39/56 : 13/24

х = 39/56 * 24/13

х = 3/7 * 3/1

х = 9/7

х = 1 2/7

2 2/3х - 1 5/7 = 3 1/21

2 2/3х = 1 1/21 + 1 5/7

2 2/3х = 1 1/21 + 1 15/21

2 2/3х = 2 16/21

8/3х = 58/21

х = 58/21 : 8/3

х = 58/21 * 3/8

х = 29/7 * 1/4

х = 29/28

х = 1 1/28