(500 000 - 100 000):b=80срочно пж

Question

(500 000 - 100 000):b=80
срочно пж

Answer 1

400 000 / b = 80
b = 400 000 / 80
b = 5000

Answer 2

1) 500000-100000= 400000
2)400000:80=5000