Question

прошуууууу. даю 50 б​

Answer 1

Пошаговое объяснение:

х - 6/7х = 3

7/7х - 6/7х = 3

1/7х = 3

х = 3 : 1/7

х = 3 * 7/1

х = 21/1

х = 21

к - 5/14к = 3/7

14/14к - 5/14к = 3/7

9/14к = 3/7

к = 3/7 : 9/14

к = 3/7 * 14/9

к = 1/1 * 2/3

к = 2/3

z - 2/9z = 2 2/3

9/9z - 2/9z = 2 2/3

7/9z = 2 2/3

z = 2 2/3 : 7/9

z = 8/3 * 9/7

z = 8/1 * 3/7

z = 24/7

z = 3 3/7

(5,2с + с) * 0,5 = 9

6,2с = 9 : 0,5

6,2с = 18

с = 18 : 6,2

с = 18 : 62/10

с = 18 * 10/62

с = 9 * 10/31

с = 90/31

с = 2 28/31