Question

Dupa ce se cumpeste cu 20 la suta si apoi ieftineste cu 20 de lei ..un obiect costa 124 de lei,..aflati pretul initial.e urgent pana la ora 3 !! Va implor!!

Answer 1

x+20%·x-20=124 lei

x+20/100·x-20=124

x+1/5·x=124+20

5x/5+x/5=144

6x/5=144
6x=144·5
6x=720
x=720:6
x=120 lei
verificare

x+20%·x-20=124 lei
120+24-20=124
144-20=124
124=124

Answer 2

ax20%-20%=140 lei

124=80%
124:80x100=155
155=120%\
155:100x80=124 lei initial