Question

решение уравнений (900-x:6)*5=4200

325+(90-n):17=30

Answer 1

Уравнение
(900-X:6)* 5=4200
(900-x:6)=4200:5
(900-x:6)=840
900-x:6=840
x:6=900-840
x:6=60
x=60*6
x=360

Answer 2

(900-X:6)* 5=4200 
(900-x:6)=4200:5 
(900-x:6)=840 
900-x:6=840 
x:6=900-840 
x:6=60 
x=60*6 
x=360