13/15z-(7/9+1/3z)=7 2/9

Ответ:

Пошаговое объяснение:

13/15z-(7/9+1/3z)=7 2/9

13/15z - 7/9 - 1/3z = 7 2/9

8/15z - 7/9 = 7 2/9

8/15z = 7 2/9 + 7/9

8/15z = 8

z = 8 * 15/8

z = 15