Question

Dupa o reducere cu 20% un obiect costa 120 lei.Aflati pretul initial.Va rog ajutatima

Answer 1

100%-20%=80%
120 lei..................................80%
 x lei....................................100%
x=100x120:80=12000:80=150 lei
R: Pretul initial a fost de 150 lei

Answer 2

x⇒pret initial
x-20%×x=120⇒
x-20x|100=120⇒
100x-20x|100=120⇒
80x|100=120⇒
80x=12ooo⇒x=12000|80⇒x=150
succes