28:х=400:100 помогите.

Question

28:х=400:100 помогите.

Answer 1

28:х=400:100
28:х=4
х=28:4
х=7
Проверка
28:7=400:100
    4=4

Answer 2

28:x=400:100
28:x=4
x=28:4
x=7