решите уравнение 8целых 9/26 - z = 5целых 7/39

8 9/26-z==5 7/39z=8 9/26-5 7/39=3 54/156- 28/156=3 26/156=3 13/78=3 1/6z=3 1/6

8 9/26 - z = 5 7/39- z = 202/39 - 217/26- z = ( 404 - 651) / 78- z = - 247 / 78 ( сокращаем на 13)- z = -19 / 6z = 19/6z = 3 целых 1/6