Answer: The balance in allowance for doubtful accounts after bad debt expense is recorded is any existing balance in the allowance for doubtful accounts plus the bad debt expense.
Explanation: The question is not complete but balance in allowance for doubtful accounts can arrived at by constructing a movement schedule as follows:
Opening balance $XXX
Addition (Bad debt expense) XXX
Write-off (XXX)
Balance at end of the period/year XXX