Question

intr-o curte sunt iepuri si porumbei,adica 51 capete si 132picioare.Cati iepuri si cati porumbei sunt?

Answer 1

Pp ca sunt numai iepuri⇒51*4=204picioare
204-132=72 de picioare in plus
72:2=36 porumbei 51-36=15 iepuri
metoda reducerii la absurd

Answer 2

i+p=51=>p=51-i
4i+2p=132
4i+2(51-i)=132
4i+102-2i=132
2i=132-102
i=30:2
i=15 iepuri
p=51-15
p=36 porumbei