Răspunsuri

2014-10-26T15:53:34+02:00
X-pretul initial
dupa scumpire:x+20/100=(100x+20x)/100=80x/100 simplif=6x/5
supa ieftinire: 6x/5-(30/100)·(6x/5)=6x/5-9x/25=(30x-9x)/25=21/25
21x/25=4200
x=(4200·25)/21=5000
pretul initial :5000 lei
dupa scumpire: 5000+20/100·5000=5000+1000=6000 lei
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