Question

Mihaela,Alexandra si Costin au strans impreuna o suma de bani.Mihaela si Alexandra au impreuna suma de 324 de lei, Alexandra si Costin au impreuna suma de 362 de lei,iar Mihaela si Costin au impreuna suma de 312 lei.Ce suma a pus fiecare?

Answer 1

a+b+c=?
a+b=324 lei
b+c=362 lei
a+c=312 lei
2*a+2*b+2*c=324+362+312
2*a+2*b+2*c=998 lei
a+b+c=998:2
a+b+c=499 lei
a=mihaela
b=alexandra
c=costin
a=499-363
a=136 lei
b=499-312
b=187 lei
c=499-324
c=175 lei