Anonymous

# Help with simple math problem?

a farm has chickens and hens. there's a total of 120 heads and 380 feet. how many of each are there?

Update:

oops! i meant pigs and chickens. sorry!

Relevance

50-Chickens

70-Pigs

Work:

(1) 2x+4y=380

(2) x+y=120

Work equation (1) and then work eauation (2)

(1) 2x+4y=380

divided by 2 on each side: x+2y=190

subtract 2y from each side: x=190-2y

(2) x+y=120

subtract y from each side: x=120-y

then take (1) and (2)

120-y=190-2y

120+y=190

subrtact 120 from each side: y=190-120

y=70

just plug in the values to find the actual x and there you go :).

Source(s): Math Minor in College

... trick question? Both chickens and hens both have 2 feet each, meaning there should logically be 240 feet for the 120 heads. Unless this is some sick slaughterhouse joke or something.

ya got me all confused so theres 120 heads and 380 feet after they cut those off?

Use this formula

(Animal Type 1:X)x(Number of Legs on that type) + (Animal Type 2:Y)x(Number of Legs on that type)