Question

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

Answer 1

6 b mici...........12 b mari.........96 kw -
6 b mici.............6 b mari ........60kw
_______________________________
=......................6 b mari .......=36 kw
36 kw:6= 6 kw consuma un bec mare
6 *x+6x6=60 kw
6x+36=60kw
6x=60-36
6x=24 kw
x=24:6
x=4 kw consuma un bec mic
proba
6x4kw +12x6 kw=24kw+72 kw=96 kw