# Math

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Count ostriches and llamas. Someone counted 47 heads and 122 legs. How many of each animals is on the farm.

• Math -

a = number of ostriches

b = number of llamas

That mean numbers of animals = 47

Numbers of animals = number of ostriches + number of llamas

a + b = 47

Numbers of legs = 122

Ostriches have two legs and llamas have four legs so :

2a + 4 b = 122

Now you must solve system of two equations :

a + b = 47

2a + 4 b = 122

The solutions are :

a = 33

b = 14

There are 33 ostriches and 14 llamas.

• Math -

33 ostriches and 14 llamas

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