A business is an organization in which basic resources (inputs), such as materials and labor, are assembled and processed to provide goods or services (outputs) to customers. A business entity may take the form of a sole proprietorship, partnership, or corporation. Regardless of the business form, the accounting equation shows the relationship among the entity's assets, liabilities, and stockholders' equity.
The Accounting Equation
The details of the activities of a company, or transactions, are recorded in a company's accounting system. These transactions are summarized in a set of reports known as the financial statements. The foundation for the accounting system and the financial statements is the accounting equation.
Assets = Liabilities + Stockholders' Equity
The left side of the accounting equation shows the economic resources of the company = the right side of the accounting equation summarizes who provided those assets:
Creditors or the stockholders
As transactions occur, they affect the accounting equation, but the accounting equation must always stay in balance. A transaction can increase both sides or decrease both sides. A transaction could also affect only one side by increasing one account and decreasing another on the same side of the accounting equation.
Applying the concepts:
Analyzing changes to assets, liabilities and stockholders' equity
Thomas Company: The table below demonstrates the effect of the first three transactions for Thomas Company. Review the details of each transaction and determine the effect on the accounting equation. Then, enter the updated amounts for the assets, liabilities, and equity accounts (do not record the transaction). If an updated balance is zero, enter "0".

Jones Company:
Analyze the accounting equation for another business, Jones Company. Assume that the assets are $54,000 and the liabilities are $21,600. By rearranging the accounting equation, you determine that stockholders' equity is $.
During the year, the company issued additional stock for $4,000. The company also paid off $2,500 of its debt. What would the accounting equation look like after these two transactions are recorded?

+ Stockholders' Transaction Assets Liabilities Equity SO $0 Beginning Invest in the Business The company issues stock in exchange for $21,000. This increases the assets of the business. The owners (stockholders) have a claim on the assets, so stockholders' equity also increases. Borrow Cash The company borrows $10,500 cash from the local bank. This transaction also increases assets. The company now owes the bank; therefore, the bank has a claim on the assets. Thus, liabilities increase. Notice this transaction did not affect stockholders' equity. Purchase equipment The company pays cash for a piece of equipment costing $7,500. The company has merely exchanged one asset (cash) for another asset (equipment). II %24