Răspunsuri

2014-09-27T12:36:12+03:00
AB+AD+BD=40
CD+BC+BD=42
AB+BC+DC+AD=50
Adunam primele doua relatii si obtinem
AB+CD+AD+BC+BD+BD=82, dar AB+BC+DC+AD=50
50+2BD=82
2BD=82-50
2BD=32
BD=16