Question

уравнение 8 9/26 - z=5 7/39

Answer 1

8 9/26 - z=5 7/39

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

z=-3 1/6

Answer 2

217/26-z=202/39

3*217/78-404/78=z

434/78-404/78=z

30/78=z

15/39=z