For the given systems we have:
1) Swap the right sides of both equations in system A.
2) No, the systems are not equivalent systems.
The two systems are:
A:
-10x - 4y = 0
-2x + 7y = 8
B:
-10x - 4y = 8
-2x + 7y = 0
Notice that the only different thing between the systems is that the right sides are inverted. So, if we invert the right side of A, we will get system B.
2) Are the systems equivalent?
No, the systems are not equivalent because to go from system A to system B we only modified the right side of system A, the systems would be equivalent only if modifying both sides of A gave system B, but this is not the case.
If you want to learn more about systems of equations:
https://brainly.com/question/13729904
#SPJ1