Answer the following question.
Erin is sorting through the library books to decide which ones to replace. She finds 8 less than 6 times as many obsolete books as damaged books. If she removes 69 books total, how many books were damaged?
Step-by-step reasoning process: Let o be the number of obsolete books and d be the number of damaged books. We know that o + d = 69 and o = 6d - 8. Substituting the first equation into the second equation, we get 6d - 8 + d = 69. Combining like terms, we get 7d - 8 = 69. Adding 8 to both sides, we get 7d = 77. Dividing both sides by 7, we get d = 11.
The answer is 11.

Answer the following question.
The community leader of a certain town organized a cleaning day event where community members were to be involved in collecting trash inside the town. Out of 2000 community members involved in the cleaning process, 30% were adult men. If there were twice as many adult women as adult men in the event, and the rest were children, calculate the total number of children involved in the cleaning event.
Step-by-step reasoning process: If the number of adult men involved in the cleaning process was 30% of the community members, there were 30 / 100 * 2000 = 600 adult men at the event. There were also twice as many adult women as adult men in the event, a total of 2 * 600 = 1200 women. The total number of adults in the event was 1200 + 600 = 1800. If the rest of the people at the cleaning event were children, there were 2000 - 1800 = 200 children at the event.
The answer is 200.

Answer the following question.
One-half of a pound of mangoes costs $0.60. How many pounds can Kelly buy with $12?
Step-by-step reasoning process: One pound of mangoes cost $0.60 x 2 = $1.20. So Kelly can buy $12 / $1.20 = 10 pounds of mangoes.
The answer is 10.

Answer the following question.
John attends a protest for 4 days. He then attends a second protest for 25% longer than the first. How many days did he spend protesting?
Step-by-step reasoning process: The second protest was 4 * .25 = 1 day longer than the first. So the second protest was 4 + 1 = 5 days. Thus he spent 4 + 5 = 9 days protesting.
The answer is 9.