Question

Afati ce suma de bani avea o persoana stiind ca dupa ce a cheltuit 10 alei si inca 40% din rest ia mai ramas jumatate din suma initiala.

Answer 1

1)    x-10lei
2) x-10lei-{  x-40%[x-(x-10 lei)]}=x/2
=>x-10lei-[40(x-x+10lei)/100]=x/2
x-10lei-400/100=x/2
x-10lei-4lei=x/2
x=28lei
cred...