Răspuns :
x-Pret initial
x-15x/100=25.5 amplificam cu100 pt a avea acelasi numitor
100x-15x=2550
85x=2550
x=2550:85
x=30 lei
x-15x/100=25.5 amplificam cu100 pt a avea acelasi numitor
100x-15x=2550
85x=2550
x=2550:85
x=30 lei