1. Aflati cat consuma un bec mare.
6 becuri mici + 12 becuri mari =96 kw ------ (aici se scad cele 2 operati)
6 becuri mici + 6 becuri mari =60 kw
______________________________ m=mici M= mari b=cecuri/bec
0 becuri mici 6 becuri mari =36 kw
1 bec mare =6 kw
2.Aflati cat costa un bec mic
6 bm + 6 bM =60
6 bm + 36 kw = 60 kw
6 bm = 60kw-36 kw
6bm =24 kw=>1 bec mic =4kw
