Two white socks cost 25 cents more than a single brown sock, meaning a brown sock is sold at $0.45-$0.25=$0.20

The cost of buying 15 brown socks is 15*$0.20=$<<15*0.20=3>>3

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Two white socks cost 25 cents more than a single brown sock. If two white socks cost 45 cents, how much would you pay for 15 brown socks?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
3
Two white socks cost 25 cents more than a single brown sock. If two white socks cost 45 cents, how much would you pay for 15 brown socks?
train