Final answer:
Without the actual system of equations, the solution cannot be provided. Information on linear equations and sign conventions for downward motion in physics is discussed.
Step-by-step explanation:
The student's question appears to be asking for the solution to a system of equations, but the actual equations are not provided. Therefore, I cannot provide a solution to the system. However, I can address some of the reference information provided. Linear equations, like those mentioned in the reference question (A. y = -3x, B. y = 0.2 + 0.74x, C. y = -9.4 - 2x), are equations of the first degree, meaning they graph as straight lines with constant slope and can be written in the standard form Ax + By = C, where A, B, and C are constants.
As for the reference to objects moving downward, the convention is typically to assign a negative sign to indicate a direction opposite to the positive coordinate axis, which is usually upward. In physics questions about motion, like those dealing with acceleration due to gravity, downward motion is often considered negative.