Ответ:

Пошаговое объяснение:

3. 2/3 - 2. 1/2 : х = 1. 1/2

2. 1/2 : х = 3. 2/3 - 1. 1/2

2. 1/2 : х = 3. 4/6 - 1. 3/6

2. 1/2 : х = 2. 1/6

х = 2. 1/2 : 2. 1/6

х = 5/2 : 13/6

х = 5/2 * 6/13

х = 30/26

х = 15/13

х = 1. 2/13

3/8 * х + х = 1. 1/4

3/8х + х = 1. 1/4

1. 3/8х = 1. 1/4

11/8х = 5/4

х = 5/4 : 11/8

х = 5/4 * 8/11

х = 5/1 * 2/11

х = 10/11

7. 4/9 * х + 1. 2/3 = 7. 1/4

7. 4/9х + 1. 2/3 = 7. 1/4

7. 4/9х = 7. 1/4 - 1. 2/3

7. 4/9х = 7. 3/12 - 1. 8/12

7. 4/9х = 6. 15/12 - 1. 8/12

7. 4/9х = 5. 7/12

67/9х = 67/12

х = 67/12 : 67/9

х = 67/12 * 9/67

х = 9/12

х = 3/4

15. 4/5х - 2. 2/3 = 3. 5/6

15. 4/5х = 3. 5/6 + 2. 2/3

15. 4/5х = 3. 5/6 + 2. 4/6

15. 4/5х = 5. 9/6

79/5х = 39/6

79/5 = 13/2

х = 13/2 : 79/5

х = 13/2 * 5/79

х = 65/158

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