A friend's math problem about horses, 100 horses, 100 watts, 3 male horses, 2 female horses, 1 pony, how many horses are there?
Male x female y small z
3x + 2y +z/2 = 100
x+y+z= 100
Draw (a conclusion)
(x，y，z) (20，0，80) ( 17，5，78 ) ( 14， 10，76)( 1 15，74) (8，20，72) (5，25，70) (2，30，68)