1)4/7:х=1
2) 5 2/3 : х = 3 7/9
3) (2 4/15-1 5/12) : 3 2/5 + 6 4/9 : 2
решите

Пошаговое объяснение:

1.

х = 4/7 : 1

х = 4/7

2.

х = 5 2/3 : 3 7/9

х = 17/3 : 34/9

х = 17/3 * 9/34

х = 3/2

х = 1 1/2

3.

1) 3 4/15 - 1 5/12 = 3 16/60 - 1 25/60 = 2 76/60 - 1 25/60 = 1 51/60 = 1 17/20

2) 1 17/20 : 3 2/5 = 37/20 * 5/17 = 37/68

3) 1 4/9 : 2 = 13/9 * 1/2 = 13/18

4) 37/68 + 13/18 = 333+442 / 612 = 775/612 = 1 163/612