Respuesta :

zrh2sfo
The result is -6 
Hope this helps.
bossboy3000o
x=-3y-6
Hope this helps

Here's how i found it 

Let's solve for x.−3x−9y=18
Step 1: Add 9y to both sides.−3x−9y+9y=18+9y−3x=9y+18
Step 2: Divide both sides by -3.−3x−3=9y+18−3


x=−3y−6