Question

in a group of cows and ducks the number of legs are 24 more than twice the number of heads. What is the number of cows in the group

Answer 1

Let the number of cows be x and the number of ducks be y.

Then,

4x + 2y = 2 (x + y) + 24

4x + 2y = 2x + 2y + 24

2x = 24

x = 12