Ответ:

X-9 3/7-6 5/14-5 8/21

x-9 3/7-6 15/42-5 16/42

X-9 3/7-5 57/42-5 16/42 X-9 3/7-41/42

x=41/42+9 3/7

x=41/42+9 18/42 x=9 59/42

x=10 17/42

Ответ:

на фотографии ответ)))))