Answer:
To find the value of y that satisfies the given equations, let's solve the system of equations using the method of elimination.
System A:
-3x + y = -9
3x - y = -9
Adding the two equations together eliminates the variable 'y':
(-3x + y) + (3x - y) = -9 + (-9)
-3x + 3x + y - y = -18
0 = -18
The resulting equation is 0 = -18, which is not true. This means that System A has no solution.
Now, let's consider System B:
3x - y = -9
In this case, we only have one equation with two variables, so we cannot determine a unique solution for y. The value of y can be any real number.
Therefore, for System B, y can be any real number.