Question

Помогите пожалуйста с полным объяснением ( даю 50 балов)

Answer 1

Пошаговое объяснение:

а) х-2/3=1/5

х= 1/5 + 2/3

х = (1×3+2×5)/3×5

х = (3+10)/15

х = 13/15

-------------------

13/15 - 2/3 = 1/5

(13-10)/15 = 1/5

3/15 = 1/5

1/5 = 1/5

б) 4/5 - х = 2/15

х = 4/5 - 2/15

х = (4×3 - 2×1)/15

х = (12-2)/15

х = 10/15

х = 2/3

‐-----------------------------

4/5 - 2/3 = 2/15

(4×3 - 2×5)/15 = 2/15

(12-10)/15 = 2/15

2/15 = 2/15

в) 2/9 + х = 5/6

х = 5/6 - 2/9

х = (5×3 - 2×2)/18

х = (15-4)/18

х = 11/18

---------------------------

2/9 + 11/18 = 5/6

(2×2 + 11)/18 = 5/6

(4+11)/18 = 5/6

15/18 = 5/6

5/6 = 5/6

Answer 2

Ответ:

Пошаговое объяснение:

А)

х - 2/3 = 1/5

х = 1/5 + 2/3

х = 3/15 + 10/15

х = 13/15

Б)

4/5 - х = 2/15

х = 4/5 - 2/15

х = 12/15 - 2/15

х = 10/15

х = 2/3

В)

2/9 + х = 5/6

х = 5/6 - 2/9

х = 15/18 - 4/18

х = 11/18