Răspuns :
2p +g +3b = 720
p = 2b
g = b +p
2 x 2b + b + p +3b =720
b + b + 2b + 3b = 720
10 b = 720
b=72
p = 2b
p =2 x 72
p=144
g = b+ p
g =72 + 144
g = 216
p = 2b
g = b +p
2 x 2b + b + p +3b =720
b + b + 2b + 3b = 720
10 b = 720
b=72
p = 2b
p =2 x 72
p=144
g = b+ p
g =72 + 144
g = 216