Together, Amy and Betty have 20 apples. Amy has three times the number of apples that Betty has. How many more apples than Betty does Amy have?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Together, Amy and Betty have 20 apples. Amy has three times the number of apples that Betty has. How many more apples than Betty does Amy have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
Together, Amy and Betty have 20 apples. Amy has three times the number of apples that Betty has. How many more apples than Betty does Amy have?
train