Пошаговое объяснение:

3 1/15 - 1 14/15 * х = 1/6

1 14/15 * х = 3 1/15 - 1/6

1 14/15х = 3 2/30 - 5/30

1 14/15х = 2 32/30 - 5/30

1 14/15х = 2 27/30

1 14/15х = 2 9/10

29/15х = 29/10

х = 29/10 : 29/15

х = 29/10 * 15/29

х = 1/2 * 3/1

х = 3/2

х = 1 1/2

(7/18 + 5/24 * у) : 3 2/3 = 1/3

7/18 + 5/24 * у = 1/3 * 3 2/3

7/18 + 5/24у = 1/3 * 11/3

7/18 + 5/24у = 11/9

5/24у = 11/9 - 7/18

5/24у = 22/18 - 7/18

5/24у = 15/18

у = 15/18 : 5/24

у = 15/18 * 24/5

у = 3/3 * 4/1

у = 12/3

у = 4

(4/7 + 5/14 - 10/21) * х = 1/7

(24/42 + 15/42 - 20/42) * х = 1/7

19/42 * х = 1/7

х = 1/7 : 19/42

х = 1/7 * 42/19

х = 1/1 * 6/19

х = 6/19

х - 5/12 * х = 1/4

х - 5/12х = 1/4

12/12х - 5/12х = 1/4

7/12х = 1/4

х = 1/4 : 7/12

х = 1/4 * 12/7

х = 1/1 * 3/7

х = 3/7