👤

ANDREI, MARIN si ION au impreuna 36 lei. Daca ANDREI si MARIN au impreuna 26 lei, iar MARIN si ION au impreuna 24 lei, cati lei are fiecare baiat?

Răspuns :

A+M+I=36
A+M=26
M+I=24
A+2M+I=50 de unde rezulta ca Marin are 50-36=14 lei
Andrei=36-14=12lei
Ion=24-14=10lei
a+m+i=36
a+m=26
m+i=24

36-26=10 ion
m+10=24=>m=24-10=>m=14 marin

a+14=26=>a=26-14=>a=12 andrei

proba: 12+14+10=36