Read the following situation:
There are 13 animals in the barn. Some are chickens and some are pigs. There are 40 legs in all. How many of each animal are there?
When setting up the system, what could the variables represent? Select all that apply.
A. Total number of chicken legs
B. Total number of pigs
C. How long until the number of pigs and chickens are equal.
D. How many animals in the barn
E. Total number of pig legs
F. Total number of chickens
G. Where the lines cross