x-8/100x=322 =>x-2x/25=322 =>25x-2x=8050 =>23x=8050 =>x=350 lei pretul initial al aspiratorului. 350-p/100*350<300 =>350-35p/10<300 =>3500-35p<3000 =>-35p<-500 (-1) =>35p>500 =>p>500/35 =>p>14,28=>p=15% proba 350-15/100*350=350-105/2=(700-105)/2=595/2=297,5