Question

A farmer has cows and ducks on a truck. These are the only creatures on the truck. Altogether, there are 15 heads and 44 legs on the truck. How many cows are on the truck? How many ducks?

Answer 1

7 cows 8 ducks

Answer 2

How do you know ?

Answer 3

x is the cows y is the ducks
x+y = 15
cows have 4 legs ducks have 2
4x+2y=44
multiply the first equation by 2
2x+2y =30
4x+2y=44
-2x=-14
divide each side by -2
x=7
plug x=7 into the first equation, x+y=15
7+y=15
y=8
so there are 7 cows and 8 ducks

Answer 4

Thanks ! :)

Answer 5

Your welcome!

Answer 6

Thanks for the medal

Answer 7

Your welcomed.