15/3=<<15/3=5>>5 cats were adopted out of 15
There were 15-5 = <<15-5=10>>10 cats left
5*2=<<5*2=10>>10 more cats were added.
This makes 10+10=<<10+10=20>>20 cats in the shelter.
20*2=<<20*2=40>>40 dogs came into the shelter.
There are now 20+40=<<20+40=60>>60 animals in the shelter.
#### 60