Question

(390-120÷×)÷6=60 решение

Answer 1

(390-120÷×)÷6=60
390-120÷×=60*6
390-120÷×=360
120÷×=390-360
120÷×=30
x=120÷30
x=4

Answer 2

(390-120:х) : 6 = 60
390-120:х = 60*6
390-120:х=360
120:х= 390-360
120:х = 30
х= 120 :30
х=4
проверка: (390-120:4):6 = (390 - 30):6 = 360 : 6 = 60
60=60
ответ: х= 4