A pet store owner had 12 birds, 9 puppies, 5 cats, and 15 spiders. Half the birds were sold and 3 puppies were adopted. Then, someone left the spider enclosure open and 7 of them went loose. How many animals does the pet store owner have left?
There are 12/2 = <<12/2=6>>6 birds left.
There are 9-3= <<9-3=6>>6 puppies left.
There are 15 - 7 = <<15-7=8>>8 spiders left.
The pet store owner has 5+6 + 6 + 8 = <<5+6+6+8=25>>25 animals left
#### 25