The double-entry system requires that each transaction must be recorded: Group of answer choices in at least two different accounts. in two sets of books. in a journal and in a ledger. first as a revenue and then as an expense.

The double-entry system requires that each transaction must be recorded in at least two different accounts.

Here's why:

1. The double-entry system is a fundamental concept in accounting where every financial transaction impacts at least two accounts.

2. The system is based on the accounting equation, Assets = Liabilities + Equity. To keep this equation in balance, the double-entry system records transactions as both a debit and a credit, and the total debits must always equal the total credits.

3. For example, if a company borrows money from a bank, it would debit (increase) its Cash account and credit (increase) its Loans Payable account.

4. Therefore, each transaction in the double-entry system is recorded in at least two different accounts, but not necessarily in two sets of books, not necessarily first as a revenue and then as an expense, and while it is recorded in a journal and then posted to a ledger, the requirement is about the accounts affected, not where it's recorded.