curci-a
cai-b
vaci-c
2a+2b+2c=134 (toate animalele au cate doi ochi, daca nu exista vreo anomalie genetica :)) sau a+b+c=67
2a+4b+4b=218 (curcile au 2 picioare, celelalte animale au cate patru) sau simplificat cu 2 : a+2b+2c=109 sau a+b+c+b+c=109
67+b+c=109 =>b+c=42
c=3b+2 (se da in problema)
b+3b+2=42
4b=40 =>b=10 cai
c=3x10+2 =>c=32 vaci
a+10+32=67 =>a=25 curci
