Answer:
Accounting equation is as follows:
Total assets = Total liabilities + Stockholder's equity
(a) Providing services to the customers on account will increase the stockholders equity in terms of service revenue by $4,900 and increases the total assets in terms of account receivable by $4,900.
(b) Purchasing an equipment at a cost of $10,300 by signing a note with the bank will increase the total assets in terms of equipment by $10,300 and also increases the liabilities in terms of notes payable by $10,300.
(c) Payment of advertising expenses for the current month reduces the total assets in terms of cash by $2,000 and also decreases the stockholder's equity by $2,000.