Ответ:

1) (y+5/7)*1/3=2 4/9y+5/7=22/9:1/3y+5/7=22/9*3y+5/7=22/3y+5/7=7 1/3y=7 1/3-5/7y=7 7/21-15/21y= 6 13/21

2)(5/12-х) : 1/2=2/95/12:1/2-х:1/2=2/95/6-2х=2/92х=5/6-2/92х=15/18-4/182х=11/18х=11/36

Verified answer

Пошаговое объяснение:

(у + 5/7) * 1/3 = 2 4/9

у + 5/7 = 2 4/9 : 1/3

у + 5/7 = 22/9 * 3/1

у + 5/7 = 22/3 * 1/1

у + 5/7 = 22/3

у = 22/3 - 5/7

у = 154/21 - 15/21

у = 139/21

у = 6 13/21

(5/12 - х) : 1/2 = 2/9

5/12 - х = 2/9 * 1/2

5/12 - х = 2/18

х = 5/12 - 2/18

х = 15/36 - 4/36

х = 11/36