Martha spent 6/2=<<6/2=3>>3 dollars.

Martha and Doris spent 6+3=<<6+3=9>>9 dollars.

There were 15+9=<<15+9=24>>24 dollars in the cookie jar at first.

# Answer

24
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
There was some money in the cookie jar. Doris spent $6 from the cookie jar. Martha spent half as much as Doris. If there were $15 left in the cookie jar, how much money, in dollars, was there in the cookie jar at first?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
24
There was some money in the cookie jar. Doris spent $6 from the cookie jar. Martha spent half as much as Doris. If there were $15 left in the cookie jar, how much money, in dollars, was there in the cookie jar at first?
train