Asap! and give the step-by-step answer! given the system of linear equations. x=y+3 y=-4x-3part a: solve the linear system of equations by graphing part b: use substitution to solve the linear system of equations part c: use addition to solve the linear system of equations in your final answer, include all of your work, the graph of the equations and the solution.

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.