Răspunsuri

2014-05-12T13:43:37+03:00
X- pret initial
x+4x/100=A - noul pret
A-2A/100=509.6
100A-2A=50960
98A=50960
A=520

x+4x/100=520
100x+5x=52000
105x=52000
x=495.23
2 4 2