There are some chickens and goats on a farm. Given that the animals have a total of 50 heads and 140 legs, how many more more chicken than goats are there?

Let the number of goats be 'x'.

Therefore, the number of chicken will be 50-x

Total number of legs the goats will have = 4x (goats have 4 legs)

Total number of legs chickens will have = 2 (50-x) (chickens have two legs).

4x + 2 (50-x) = 140

4x+100-2x=140

2x+100=140

2x=40

x=20.

There are 20 goats and 30 chickens.