Răspuns :
x- pret initial
x-10x/100=162
x-x/10=162
10x-x=1620
9x=1620
x=1620:9
x=180 lei
x-10x/100=162
x-x/10=162
10x-x=1620
9x=1620
x=1620:9
x=180 lei
P-P*10/100=162
P-P/10=162
(10P-P)/10=162
9P=1620
P=1620/9
P=180 lei