Question

cati bani are irina andrreisi bianca daca bianca si andrei au 474 lei andrei si irina au 329 bianca si irina 503 lei

Answer 1

b+a=474
a+i=329
b+i=503
Scadem ultimele 2 relatii:
b-a=503-329
b-a=174
b+a=474
Adunam aceste 2 relatii:
2b=474+174
2b=648
b=648:2
b=324

b+a=474
324+a=474
a=474-324
a=150

b+i=503
324+i=503
i=503-324
i=179