Răspunsuri

2014-05-25T09:34:33+03:00
/x-pretul initial
prima ieftinire: 10x/100
x-10x/100=(100x-10x)/100=90x/100=9x/10
dupa scumpire: 9x/10·6/100=54x/1000
9x/10+54x/1000=(900x+54x)/1000=954x/1000
954x/1000=95,4
x=95,4·1000/954
x=100 lei pretul initial
verificare
100·10/100=10 lei
100-10=90 lei 
90·6/100=5,4 
90+5,4=95,4