Răspuns :
x-pretul initial
10% din x=10/100 *x= 1/10 *x=x/10 -reducerea
x-x/10=(10x-x)/10=9x/10
9x/10=1080
x=10*1080/9
x=10*120
x=1200 -pretul intial
x/10=1200/10=120 lei a fost reducerea
10% din x=10/100 *x= 1/10 *x=x/10 -reducerea
x-x/10=(10x-x)/10=9x/10
9x/10=1080
x=10*1080/9
x=10*120
x=1200 -pretul intial
x/10=1200/10=120 lei a fost reducerea