There are 23 animals in the barn. Some are chickens and some are goats. There are 80 legs in all. How many of each animal is there?

Question

Solve by graphing. (I need an example I can use to study the rest of my homework)

Answer 1

I'm sorry, but NO..

you can graph at www dot desmos dot com

C + g = 23 --> g = 23- c

2C + 4g = 80

2c + 4(23-c) = 80

2c + 92 - 4c = 80

-2c = -12

c = 6

6 chickens, 17 goats

6*2 + 17*4 = 12+68=80 legs

the official answer is 6 chickens, 17 goats