3. Seiji and Gavin both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. How much did each of them earn? a. Write a system of two equations with two variables to model this problem. b. Use substitution or the elimination method to solve the system. c. Graph both equations. d. Answer the question. I mainly just need you to explain how to graph it please