Răspuns :
p + g = 6 | *(-2) => -2p - 2g = -12
4p + 2g = 16 4p + 2g = 16
---------------------- suma lor este ...
2p = 4 => p = 2
⇵
g = 6-2 = 4
4p + 2g = 16 4p + 2g = 16
---------------------- suma lor este ...
2p = 4 => p = 2
⇵
g = 6-2 = 4
porci = p ( 4 picioare)
gaini = g ( 2 picioare)
p + g = 6
4p + 2g = 16
p = 6 - g
4(6-g) + 2g = 16
24 - 4g + 2g = 16
24 - 16 = 2g
8 = 2g
g = 8 : 2
g = 4 gaini
p = 6 - 4 = 2 porci
gaini = g ( 2 picioare)
p + g = 6
4p + 2g = 16
p = 6 - g
4(6-g) + 2g = 16
24 - 4g + 2g = 16
24 - 16 = 2g
8 = 2g
g = 8 : 2
g = 4 gaini
p = 6 - 4 = 2 porci