Răspunsuri

2014-04-29T17:39:49+03:00
X lei.................100%
x-200............... 80% 
200= 20 %
100%= 1000 
pret produs dupa ieftinire= 800 lei
2014-04-29T17:40:02+03:00
X-2x/10 pretul dupa ieftinire 
x-2x/10=x-200
8x/10=x-200
10x-2000=8x
10x-8x=2000
2x=2000
x=1000