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
"explanation : let the number of cows be x and the number of hens be y . then , 4 x + 2 y = 2 ( x + y ) + 16 4 x + 2 y = 2 x + 2 y + 16 2 x = 16 x = 8 . answer : b"
subtract(16, const_4)