Răspunsuri

2014-05-05T15:49:28+03:00
X- pret initial
x+15x/100=A - pret dupa prima crestere
A+20A/100=828 Amplif cu 100
100A+20A=82800
120A=82800
A=690

x+15x/100=690
100x+15x=69000
115x=69000
x=600
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