Пошаговое объяснение:

№1

1/2х + 1/3х + 1/4х = 26/27

6/12х + 4/12х + 3/12х = 26/37

13/12х = 26/27

х = 26/27 : 13/12

х = 26/27 * 12/13

х = 2/9 * 4/1

х = 8/9

№2

2. 1/3х - 2. 3/5 = 1. 2/15

2. 1/3х = 1. 2/15 + 2. 3/5

2. 1/3х = 1. 2/15 + 2. 9/15

2. 1/3х = 3. 11/15

7/3х = 56/15

х = 56/15 : 7/3

х = 56/15 * 3/7

х = 8/5 * 1/1

х = 8/5

х = 1. 3/5

Ответ:

Пошаговое объяснение: