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Mathematics, 18.04.2020 04:30 joejoefofana

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

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.
B.
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.
C.
The second equation in system B is -7x = 14. The solution to system B will be the same as the solution to system A.
D.
The second equation in system B is 7x = 30. The solution to system B will be the same as the solution to system A.

To get system B below, the second equation in system A was replaced by the sum of that equation and

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