A system of equations and its solution are given below. System A To get system B below, the second equation in system A was replaced by the sum of that equation and the first equation in system A multiplied by -2. System B The second equation in system B is -7x = 14. The solution to system B will be the same as the solution to system A. The second equation in system B is 7x = 30. The solution to system B will not be the same as the solution to system A. The second equation in system B is -7x = 14. The solution to system B will not be the same as the solution to system A. The second equation in system B is 7x = 30. The solution to system B will be the same as the solution to system A.