Detailed Instructions: Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
Problem:there were 6 soccer balls in the bag . coach b. found several additional soccer balls and placed them in the bag . there are now 24 balls in the bag . how many soccer balls did he pick up ?
Solution:
18