Question

Dupa o scumpire de 20%, un obiect costa 24 lei. Aflati pretul initial.

Answer 1

x-pret initial

x+20/100x=24

x+x/5=24

se amplifica prima fractie cu 5

5x/5+x/5=24

6x/5=24

6x=120

x=20

Answer 2

x-pretul initial
20% din x= 20/100*x= 1/5 *x= x/5 -scumpirea

x+x/5= (5x+x)/5=6x/5-noul pret

6x/5=24
x=24*5/6
x=4*5
x=20