<|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
 P can finish a job in some hours, working at a constant rate. Q, also working at a constant rate, can finish the same job in 15 hours. They worked together for 3 hours, and now it will take P 12 more minutes to finish the job, working alone at his constant rate. How many hours does it take P to finish the job alone? 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
4
P can finish a job in some hours, working at a constant rate. Q, also working at a constant rate, can finish the same job in 15 hours. They worked together for 3 hours, and now it will take P 12 more minutes to finish the job, working alone at his constant rate. How many hours does it take P to finish the job alone?
test