Respuesta :

Answer:

x+3y=-9

Step-by-step explanation:

-2(x+3y)=18

x+3y=18/-2

x+3y=-9

Answer:

Step-by-step explanation:

y=-1/3x-3

Divide both sides by-2 :

x+3y=-9

3y=-x-9

y=-1/3x-3