notam cu x pretul initial.
x + 10%x = x + 10/100x = 100/100x + 10/100x = 110/100x - pretul dupa prima scumpire
110/100x + 10%*110/100x = 110/100x + 10/100*110/100x = 110/100x + 11/100x = 121/100x - pretul dupa a doua scumpire.
121/100x = 121 lei => x = (121 * 100) / 121 => x = 100 lei. - pretul initial.
