Răspuns :
deci, presupunem ca sunt doar oi (1 cap si 4 picioare) => 68* 4 =272 (pic.), deci 272-180=92 (pic.) - au gainile, iar 180-92= 88 (pic.) - au oile.
V: 92 : 2 = 46 (gaini)
88 : 4 = 22 (oi) ==> 22 + 46 =68 capete.
V: 92 : 2 = 46 (gaini)
88 : 4 = 22 (oi) ==> 22 + 46 =68 capete.
x- gaini
y= oi
x+y=68 /-2
2x+4y=180
-2x-2y=-136
2x+4y=180
-----------------(+)
/ 2y=44
y=44:2
y=22 oi
x+22=68
x=68-22
x=46 gaini
y= oi
x+y=68 /-2
2x+4y=180
-2x-2y=-136
2x+4y=180
-----------------(+)
/ 2y=44
y=44:2
y=22 oi
x+22=68
x=68-22
x=46 gaini