That's some awkward computer aided education there.
In system B we kept the first equation of system A. Then apparently we multiplied that equation by 4, giving
4x - 4y = 12
and added that to
-2x + 4y = -2
to give
2x = 10
OK, let's relate that to the boxes.
Answer:
In system B the second equation in system A was replaced by the sum of that equation and the first equation multiplied by 4. The solution to system B is the same as the solution to system A.