Question

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

Answer 1

8 9/26-z==5 7/39

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

z=3 1/6

Answer 2

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