Question

помогите пожалуйста!
задание 85 , номера 1 и 2

Answer 1

Пошаговое объяснение:

№1

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 2/3х - 1 5/7 = 3 1/21

2 2/3х = 3 1/21 + 1 5/7

2 2/3х = 3 1/21 + 1 15/21

2 2/3х = 4 16/21

8/3х = 100/21

х = 100/21 : 8/3

х = 100/21 * 3/8

х = 25/7 * 1/2

х = 25/14

х = 1 11/14