There are multiple chickens and rabbits in a cage. there are 72 heads and 200 feet inside of the cage. how many chickens are in there and how many rabbits?

Given:
Chicken
Rabbit
72 heads
200 feet

Chicken - 1 head , 2 feet
Rabbit - 1 head , 4 feet

C + R = 72
2C + 4R = 200

C = 72 - R
2(72-R) + 4R = 200
144 - 2R + 4R = 200
2R = 200 - 144
2R = 56
R = 56/2
R = 28

C = 72 - 28 
C = 44

2C + 4R = 200
2(44) + 4(28) = 200
88 + 112 = 200
200 = 200

There are 44 CHICKENS and 28 RABBITS.