Răspuns :
x - pret initial
x-10x/100= 1080 Amplificam cu 100
100x-10x=108000
90x=108000
x=108000:90
x=1200 lei pret initial
Deci reducerea a fost de 1200-1080=120 lei
x-10x/100= 1080 Amplificam cu 100
100x-10x=108000
90x=108000
x=108000:90
x=1200 lei pret initial
Deci reducerea a fost de 1200-1080=120 lei
x * 10 /100 = x/10
x - x/10 = 1080
9x = 1080
x = 1080/9
x = 120 lei reducerea
varianta B
x - x/10 = 1080
9x = 1080
x = 1080/9
x = 120 lei reducerea
varianta B