Question

Patru ucopiiau impreuna 375lei.Dupa ce primul cheltuieste 20%din bani lui,al doilea 40%din a lui,al treilea 25%din a lui si al patrulea 50%din a lui,sa constatat ca le.a ramas sume egale.Ce sume a avut fiecare fiecare la incepuut?
NIMENI????
va rooog!!!

Answer 1

a+b+c+d=375
0,8a=0,6b=0,75c=0,5d
b=0,8a/0,6=8a/6=4a/3
c=0,8a/0,75=80a/75=16a/15
d=0,8a/0,5=8a/5
a+4a/3+16a/15+8a/5 = 375 
15a+20a+16a+24a=375*15
75a=375*15
a=375*15/75=5*15=75
b=4*75/3=100
c=16*75/15=80
d=8*75/5=120
verificare 75+100+80+120=375