Question

6 becuri mici si 6 becuri mari consuma intro zi 60 de kw in alta zi 6 becuri mici si 12 becuri mari consuma 96 de kw. Cati kw consuma intro zi un bec mic si cati un bec mare.

cu intrebari va rog

Answer 1

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