Răspunsuri

2014-09-17T22:38:17+03:00
X-pretul initial

10% din x= 10/100 * x= 1/10 * x=  x/10  -scumpirea 

x+x/10 = (10x+x)/10= 11x/10 - noul pret

11x/10 = 55
x=10*55/11

x=10*5

x=50 lei
2014-09-17T22:39:45+03:00
110%...............55 lei
100%.................... x lei
_______________________
x=100x55/110
x=50 lei