cdeanrn2822 cdeanrn2822

11-12-2019
Mathematics

contestada

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 madisonvechnak23

11-12-2019

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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