Asta a dat-o la examen la subictu 2 la ex 3. Se facea asa: pret1+10%xpret 1=pret 2; pret 2-10%xpret2=1980=> p2-10/100 xp2=1980=>p2-p2/10=1980x10>10p2-p2=19800=>9p2=19800|:9=>p2=2200
p1+10%xp1=p2=>p1+10/100xp1=2200=>p1+p1/10=2200|x10=>10p1+p1=22000=>11p1=22000|:11=>p1=2000lei...Funda?