In a stable there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable?

There are 14 horses and 8 men 14*4 = 56 legs 8*2 = 16 legs

Total 72 legs.

14 horses, 8 men.

A household has some goldfish, some canaries and some rabbits. Altogether there are 15 heads and 26 legs. How many of each animal could there be?

A drove of sheep and chickens have a total of 99 heads and feet. There are twice as many chickens as sheep. How many of each are there?