Let 'x' represent the number of chickens and 'x' the number of pigs.

There are 37 chickens and pigs means:

x + y = 37

Since each chicken has 2 feet, x chickens will have 2x feet.

Since each pig has 4 feet, y pigs will have 4y feet.

We know that altogether they have 98 feet:

2x + 4y = 98 divide both sides by 2

x + 2y = 49

We have the following system of equations:

x + y = 37

x + 2y = 49

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click here to see the system of equations solved for x and y

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x = 25 chickens

y = 12 pigs

There are 25 chickens and 12 pigs.