Răspunsuri

2014-07-11T16:35:55+03:00
X-pretul initial

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

x-x/10 = (10x-x)/10 = 9x/10- noul pret 

9x/10 =99

x=10*99/9

x=10*11

x=110-pretul initial
2014-07-11T16:36:09+03:00
100%-10%=90%

90%................99lei
100%..............x lei
__________________-
x= 100x99/90
x=110 lei (pretul initial)
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