4. What is the y-coordinate of the solution of the following system? ) 3x+3y=0 4x-y=5

To find the -coordinate of the solution to the system of equations, we can use either the substitution method or the elimination method. Here, we'll use the elimination method.The given system of equations is: First, let's simplify the first equation by dividing everything by 3: Now our system looks like this: Next, we add the two equations together to eliminate : Now that we have , we substitute it back into the simplified first equation to find : Therefore, the -coordinate of the solution is .