Respuesta :

boomdyno12

Alright, so first we'll have to get y on the other side

So

2x+y=-9

   -y     -y

  +9     +9

2x+9=-y

Then divide is all by -1 so y is positive

-2x-9=y

sionnaf13

29-20=-9 that will be thw ansewer to that