Answer:
i want to say 36, im not 100% sure though
Explanation:
9 houses in 6 hours painted by 18 men.
1. you have 1 man, 12 hours = 1 house.
2. take that number of men, and times it by 18. 18 houses in 12 hours!
3. take those houses and hours, and split them both in half.
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