Respuesta :
Answer:
He have 47 ducks and 7 cows.
Step-by-step explanation:
Given:
Farmer Jones raises ducks and cows.
He looks out his window and sees 54 animals with a total of 122 feet.
Now, to find the each type of animal he have.
Let the number of ducks be [tex]x.[/tex]
And the number of cows be [tex]y.[/tex]
So, total number of animals are:
[tex]x+y=54[/tex]
[tex]x=54-y[/tex] ....( 1 )
As, the feet of cows are 4 and ducks are 2.
Now, the total number of feet are:
[tex]2(x)+4(y)=122[/tex]
[tex]2x+4y=122[/tex]
Substituting the value of [tex]x[/tex] from equation (1) we get:
[tex]2(54-y)+4y=122[/tex]
[tex]108-2y+4y=122[/tex]
[tex]108+2y=122[/tex]
Subtracting both sides by 108 we get:
[tex]2y=14[/tex]
Dividing both sides by 2 we get:
[tex]y=7.[/tex]
The number of cows = 7.
Now, to get the number of ducks we substitute the value of [tex]y[/tex] in equation (1):
[tex]x=54-y\\x=54-7\\x=47.[/tex]
The number of ducks = 47.
Therefore, he have 47 ducks and 7 cows.
