Răspunsuri

2014-05-17T13:16:04+03:00
X-pretul initial
10% din x= 10/100 *x= 1/10 *x= x/10-marirea

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

20% din 11x/10= 20/100 *11x/10= 1/5 * 11x/10= 11x/50-ieftinirea

11x/10- 11x/50= (55x-11x)/50= 44x/50-restul

44x/50=2640
x=50*2640/44
x=50*60
x=3 000lei
1 4 1