In a group of cows and hens, the number of legs are 16 more than twice the number of heads. The number of cows is
Choose the correct choice
A) 5  B) 8  C) 10  D) 12  E) 14
Explanation:   Let the number of cows be x and the number of hens be y.   Then, 4x + 2y = 2 (x + y) + 16   4x + 2y = 2x + 2y + 16   2x = 16   x = 8.   Answer: 8
<result>B</result>
In a group of cows and hens, the number of legs are 16 more than twice the number of heads. The number of cows is