2. On Monday, when taking inventory, you count 450 legs in the preparation yard. How many cows are in the yard?

Question

 What is the ratio of chickens to cows?  How do you know?

Answer 1

X  = chickens

Y = cows

 

2X + 4Y = 450

 

X + 2Y = 225

 

X = 225 - 2Y

 

Y = 1, X = 223 ---> 1 cow 223 chickens

Y=2, X = 221 ----> 2 cows, 221 chickens

Y=3, X = 219  ---> 3 cows, 219 chickens

etc etc etc

 

Y = 111, X = 3  ---> 111 cows, 3 chickens

Y=112, X = 1  ---> 112 cows, 1 chicken