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Bob keeps his cows and ducks in a barn. There are 13 animals in the barn and all together they have 34 legs. How many cows are there and how many ducks

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madisonvechnak23

Answer:

4 cows and 9 ducks

Step-by-step explanation:

X is cows and Y is ducks

X+Y= 13

4*X + 2*Y= 34

- X+Y= 13

-4*X + 2*Y= 34

4*X+ 2*Y= 34

2*X+ 2*Y= 26

2*X = 8

       X= 4

X+Y= 13

  Y= 13-4

    Y=9

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