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2014-05-19T10:54:14+03:00
X pret initial

x+10x/100=A - pretul dupa prima crestere
A+15A/100=1265
100A+15=126500
115A=126500
A=1100

x+10x/100=1100
100x+10x=110000
110x=110000
x=1000
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