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Mathematics, 27.07.2019 03:30 needsdarkness6016

Charlie and dasha are roommates, and they have a dog. if neither of them is home, they hire someone to watch the dog. charlie must go on business trips every 6 months while dasha must go on business trips every 9 months. if they both just got back from business trips, how many months will it be before they need to hire someone to look after the dog again? explain your answer.

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Charlie and dasha are roommates, and they have a dog. if neither of them is home, they hire someone...
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