Respuesta :

Answer:

B.  x=-1, y=-6

9x+4y=-33

3x+y=-9

9x+4y=-33

-4(3x+y=-9)

9x+4y=-33

-12x-4y=36

------------------

-3x+0=3

x=-1

plug in the x to either original question

3(-1)+y=-9

y=-6

final answer: x=-1, y=-6

hope this helps! :)

jasdul1375

Answer:

B  x=−1, y=−6

Step-by-step explanation:

Elimination method

Multiply the first equation by -3,and multiply the second equation by 1:

−3(3x+y=−9)

1(9x+4y=−33)

______________

−9x−3y=27

9x+4y=−33

______________

Add these equations:

y=−6

_______________

Plug it back into any given equation to solve for x:

3x+−6=−9

Solve for x:

x=−1

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