Răspunsuri

2014-01-28T13:35:45+02:00
P= prețul inițial =100/100p= 100%p; 15/100=15%
 prima reducere =100/100p-15/100p=85/100p =85%p
a doua=(100/100-5/100)*85/100p=95/100*85/100p=8075/1000p
deci 8075/1000p=646=pretul final dupa reduceri
=> p=646*1000/8075
=> p=80= pretul initial inainte de reduceri
1 5 1