Question

(21+75:(50-5x))*5=120

Answer 1

21+75:(50-5х)=120:5
21+75:(50-5х)=24
75:(50-5х)=24-21
75:(50-5х)=3
50-5х=75:3
50-5х=25
5х=50-25
5х=25
х=25:5
х=5

Answer 2

Спасибо