Answer and Explanation:
The journal entries are shown below
On Sep 10
Account receivable - king $200
To Bad debt expense $200
(Being the reinstate previously written off account receivable is recorded)
Here account receivable is debited as it increased the assets and credited the bad debt expense as it decreased the expenses
On Sep 10
Cash Dr $200
To Account receivable - king $200
(Being cash collection is recorded)
Here the cash is debited as it increased the assets and account receivable is credited as it decreased the assets