Решение уравнений (900-x:6)*5=4200 325+(90-n):17=30
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
(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