Question 999042
Calls hens and cows, x and y.
Thus x + y = 38
Now when we count legs, we have
2x + 4y = 100
Let's multiply the first equation by two and subtract...
2x + 4y = 100
-(2x + 2y = 76)
which gives
2y = 24
y = 12 cows
x = 26 chickens