Răspunsuri

2014-06-01T19:10:39+03:00
X+X ori 20/100=X+20X/100+>dupa scumpire X=1200 iar dupa ieftinire 1200-120=1080 lei

2014-06-01T19:13:55+03:00
X+20%x=x+x/5=6x/5
6x/5-10%6x/5=1080
6x/5-6x/50=54x/50=1080
=> x=1000