The accounting equation forms the basis of financial accounting and requires that assets always equal liabilities plus owners' equity. Transactions are analyzed to determine their impact on this equation. The balance sheet presents the accounting equation at a point in time, showing assets, liabilities, and owners' equity. The income statement and statement of owners' equity analyze changes over a period of time, with revenues and expenses impacting owners' equity on the income statement and investments and withdrawals impacting it on the statement of owners' equity.