Nash and Daisy both work at the same pet store. On Monday, Nash counts 53 birds and cats in the store. For the same animals, Daisy counts 136 legs. How many birds and cats are in the pet store?

For the Nash counting: b + c = 53 (b represents number of birds and c represents number of cats)

For the Daisy counting: 2b+4 = 136 (2b because each bird has 2 legs, and 4c because each cat has 4 legs)

Solve the equation system and get:

b=38 and c = 15