Question

(21+75:(2х+13))*5=120

Answer 1

(21+75:(2х+13))*5=120

(21+75:(2х+13)) =120 :5

21+75:(2х+13) = 24

75:(2х+13)= 24-21

75:(2х+13) = 3

2х+13 =75:3

2х +13 = 25

2х=25-13

2х=12

х=12:2

х=6

ОТВЕТ : 6