Answer:
Step-by-step explanation:
"On a farm, there are some cows and birds."
c and b are the number of cows and birds, respectively.
"There are 35 total heads"
c+b = 35
b = 35-c
"110 total legs."
4c + 2b = 110
4c + 2(35-c) = 110
4c + 70 - 2c = 110
2c = 40
c = 20
b = 35-c = 15
20 cows and 15 birds.
