Question

Решите данное уровнение

Answer 1

Ответ:

Пошаговое объяснение:

А)

1. 2/5 + 2. 1/2х = 5. 3/4 -

2. 17/20

1. 2/5 + 2. 1/2х = 5. 15/20 -

2. 17/20

1. 2/5 + 2. 1/2х = 4. 35/20 -

2. 17/20

1. 2/5 + 2. 1/2х = 2. 18/20

2. 1/2х = 2. 18/20 - 1. 2/5

2. 1/2х = 2. 18/20 - 1. 8/20

5/2х = 1. 10/20

х = 1. 10/20 : 5/2

х = 30/20 * 2/5

х = 6/10 * 1/1

х = 6/10

х = 3/5

Б)

2. 2/5х + 1. 2/3 = 5. 19/30 + 5/6

2. 2/5х + 1. 2/3 = 5. 19/30 + 25/30

2. 2/5х + 1. 2/3 = 5. 44/30

2. 2/5х = 5. 44/30 - 1. 2/3

2. 2/5х = 5. 44/30 - 1. 20/30

2. 2/5х = 4. 24/30

2. 2/5х = 4. 4/5

х = 4. 4/5 : 2. 2/5

х = 24/5 : 12/5

х = 24/5 * 5/12

х = 24/12

х = 2