Question

(720:х).10=90 pomaqite pojalusta

Answer 1

$(720:x)=9$
$720=9x$
$720:9=x$
$80=x$

Answer 2

(720:Х)=90:10
720:Х=9
Х=720:9
Х=80

Проверка
(720:80)*10=90