I have a trouble to answer question: 3months rent totaling $6000 was collected and recorded on November 1. The adjusting entry includes:
1. A Dr. To rent expense $2000
2. A Dr. To rent expense $4000
3. A Cr. To rent revenue of $2000
4. A Cr. To unearned rent of $4000
5. A Dr to unearned rent of $4000

Debit cash for $6000. Credit rent revenue for $2000 and credit prepaid rent (a liability) for the $4000. When you earn the rent in the month due you debit the prepaid and credit the revenue.