Question

31,8-(7/9+1/3z)=7.2/9,z

Answer 1

Ответ:             733/155 = 4 113/155 = 4.729.

Пошаговое объяснение:

31,8-(7/9+1/3z)=7 2/9z;

-7/9+1/3z-7 2/9z = -31.8;

3/9z-7 2/9z =-31.8-7/9;

- 6 8/9z = -32 26/45;

z=32 26/45 : 6 8/9;

z=1466/45 : 62/9;

z=1466/45 * 9/62;

z=733/155 = 4 113/155 = 4.729.