Answer and Explanation:
The journal entry to record the transaction is shown below:
Accounts receivable $6,900
To allowance for doubtful accounts $6,900
(Being reversing the write off is recorded)
Here account receivable is debited as it increased the assets and credited the allowance as it decreased the assets
Cash $6,900
To Accounts receivable $6,900
(Being cash collection from write off account is recorded)
Here the cash is debited as it decreased the assets and credited the account receivable as it decreased the assets