Ответ:

Пошаговое объяснение:

1)8 2/15 -(x + 3 5/14) : 5 5/8 = 7 1/3

(x + 3 5/14 ) : 5 5/8 = 8 2/15 - 7 1/3

(x + 3 5/14 ) : 5 5/8 = 8 2/15 - 7 5/15

(x + 3 5/14 ) : 5 5/8 = 4/5

x + 3 5/14 = 4/5 * 5 5/8

x + 3 5/14 = 4/5 * 45/8

x + 3 5/14 = 9/2

x = 9/2 - 3 5/14

x = 4 7/14 - 3 5/14

x = 1 2/14

x = 1 1/7

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2) 2 7/9 : ( 3 3/4 y - 11 2/3) + 1 6/7 = 2 4/21

2 7/9 : ( 3 3/4 y - 11 2/3) = 2 4/21 - 1 6/7

2 7/9 : ( 3 3/4 y - 11 2/3) = 2 4/21 - 1 18/21

2 7/9 : ( 3 3/4 y - 11 2/3)  = 1/3

3 3/4 y - 11 2/3 = 2 7/9 : 1/3

3 3/4 y - 11 2/3 = 25/9 * 3

3 3/4 y - 11 2/3 = 25/3

3 3/4 y = 25/3 + 11 2/3

3 3/4 y = 11 27/3

3 3/4 y = 20

y = 20 : 3 3/4

y = 20 * 4/15

y = 16/3

y = 5 1/3