Question

could someone help me set this up i have not done one of these problems in a while :
And on his farm he had some cows and chicken. He counted a total of 123 heads and 456 legs. How many cows does Old McDonald have?

Answer 1

Well you know cows have 4 legs and chickens have 2 legs....

And you know that both of them only have 1 head lol

...so that means

let cow = c and chicken = n

c + n = 123 **each one can only have 1 head...so yeah*

and we also know that since cows have 4 legs and chickens have 2...and there are a total of 456 legs...we have

4c + 2n = 456

a system of equations



c + n = 123
4c + 2n = 456

can you solve it?

Answer 2

yes thank you for your help :)

Answer 3

No problem! :)