Răspuns :
a+b=405 => a=405-b
c=1100=2a+4b
2x(405-b)+4b=1100
810+2b=1100 => b=(1100-810)/2 =145 vaci
a=405-145 =260 pasari
Verif: 260 x 2 picioare + 145 x 4 picioare =1100
c=1100=2a+4b
2x(405-b)+4b=1100
810+2b=1100 => b=(1100-810)/2 =145 vaci
a=405-145 =260 pasari
Verif: 260 x 2 picioare + 145 x 4 picioare =1100
p+v=405
2p+4v=1100
inmultim prima cu 2:
2p+2v=810
2p+4v=1100
scadem
2v=290
v=145 deci avem 405-145 pasari=260
2p+4v=1100
inmultim prima cu 2:
2p+2v=810
2p+4v=1100
scadem
2v=290
v=145 deci avem 405-145 pasari=260