###Human: Lucas wants to get a dog but his parents think he already has too many pets and won't have enough space. He already has 12 pet beds in his room but manages to fit another 8 pet beds. His parents argue that each pet is going to need 2 beds each to feel comfortable. According to his parent's argument, how many pets does Lucas have enough room for?, ### Assistant: Lucas has a total of 12 existing pet beds + 8 new pet beds = 20 pet beds.
So according to his parents, Lucas has enough room for 20 pet beds / 2 pet beds per pet = 10 pets. 
 So the answer is :  10