A system of equations and its solution are given below. System A 5x-y=-11 3x-2y=-8 solution: (-2,1)

Question

A system of equations and its solution are given below.

System A
5x-y=-11
3x-2y=-8
solution: (-2,1)

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
5x-y=-11
?

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 = 14. The solution to system B will be the same as the solution to system A.
C.
The second equation in system B is 7x = 30. 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 not be the same as the solution to system A.

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RuslanHeatt 3 years 2021-07-26T10:43:24+00:00 2 Answers 249 views 0

Answers ( )

    0
    2021-07-26T10:44:30+00:00

    B I had this one one of my test before

    1
    2021-07-26T10:44:56+00:00

    I think its B i could be wrong though

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )