<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Aubree saw some beavers and 40 chipmunks by a tree when going to school. While coming back from school, she realized the number of beavers had doubled and the number of chipmunks had decreased by 10. She saw a total of 130 animals that day. How many beavers did she see initially? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
20
Aubree saw some beavers and 40 chipmunks by a tree when going to school. While coming back from school, she realized the number of beavers had doubled and the number of chipmunks had decreased by 10. She saw a total of 130 animals that day. How many beavers did she see initially?
test