Question

800:[425-13•(48:4)-(89+a•4)]=10

Answer 1

Răspuns:

800:[485-13*(84:5)-(89+a*4)]=10

Answer 2

[...]=800:10=80

425-13×12-(...)=80

425-156-(...)=80

269-(...)=80

(...)=269-80=189

89+4a=189

4a=100

a=100:4

a=25