Răspunsuri

2014-05-02T12:53:16+03:00
X-pretul initial
15/100 *x= 3x/20-scumpirea
x+3x/20=  (20x+3x)/20= 23x/20-noul pret
15/100 * 23x/20=  3/20 *23x/20=  69x/400-reducerea

69x/400=1173
x=1173*400/69
x=17*400
x=6800