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20 November, 17:03

Which of the following equations have the same solution as the equation 3x+2y=-12? Check all that apply.

3x-2y=12

-3x-2y=12

15x+10y=-60

6x+2y=-12

6x+4y=-24

1.5x+y=-6

x + 2/3y=-12

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  1. 20 November, 20:37
    0
    If one equation is the same, there is a multiply factor:

    f * (3x+2y) = f * (-12)

    You need to find the same factor for both members.

    3x-2y=12. This is not the same.

    -3x-2y=12. This is the same. The factor is (-1)

    15x+10y=-60. This is the same. The factor is 5.

    6x+2y=-12. This is not the same.

    6x+4y=-24. This is not the same.

    1.5x+y=-6. This is the same. The factor is 1/2.

    x + 2/3y=-12. This is not the same.

    Good luck!

    M.
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