Решите уравнения: (720:а+20)-60=100,(720-а*6)-200=340,(3*а-20)+50=300,(у:4-35)*12=300,(150:у+6)-6=50,(8*x-30):2=225,11*(560:x-5)=33(3*a+160):10=28,800:(a+9+8)=10,y:60=640:8
(720:a+20)-60=100 (720:a+20)=100-60 (720:a+20)=40 a=70:(40-20) a=36