In a group of pigs and hens, the number of legs are 22 more than twice the number of heads. The number of pigs is  Answers.
A) 5	B) 7	C) 10	D) 12	E) 11
Explanation:   Let the number of pigs be x and the number of hens be y.   Then, 4x + 2y = 2 (x + y) + 22   4x + 2y = 2x + 2y + 22   2x = 22   x = 11   Answer: 11
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In a group of pigs and hens, the number of legs are 22 more than twice the number of heads. The number of pigs is