There are 40 cows and chicken in the farmyard. One quiet afternoon, Lack counted and found that there were 100 legs in all. How many cows and how many chickens are there?
30 Chickens and 10 Cows
To help Lack determine how many cows and chickens are on his farm, we can use a system of equations using variables for Chickens and Cows.
For the legs we can make
Cows Legs =
Chicken Legs =
We can plug the value for
Distribute the 4 to the parenthesis
Combine like terms
Use additive inverse to isolate the variable value
Use multiplicative inverse to solve for the variable