Consider the system of equations:
2x + y = 8
-4x + 4y = 16
If you perform the following sequence of elementary operations in order: Interchange both equations. Add twice the (new) first equation to the second.
What will be the new second equation?
a) -2x + 2y = 0
b) -2x + 2y = 8
c) 2x + 2y = 8
d) 2x - 2y = 16