Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
There are 35 books on the cart. There are five fiction books, 4 more non-fiction books than fiction books, 2 times as many autobiographies as fiction books, and the rest picture books. How many books were picture books?

### Response:
Non-fiction:5+4=9
Autobiographies:2*5=10
Total:5+9+10=<<5+9+10=24>>24
Picture books:35-24=<<35-24=11>>11
#### 11