how many legs does a cow have?
If you have cows and chickens the total of heads is 200 and total of legs is 540 how many chickens do you have? set up a relation x + y = 200 (for the heads, each animal has only one head, right? ) 2x + 4y = 540 (for the legs, each chicken has 2 legs, cows have 4) now, you need â¦ to eliminate a fraction.