Question

Помогите с уравнением.

Answer 1

6/7z - 1/5 = 3/4 : 3/4
6/7z - 1/5 = 1
6/7z = 1 + 1/5
6/7z = 1 1/5 
6/7z = 6/5
z = 6/5 : 6/7
z = 7/5
z = 1целая 2/5