Answer:
6
Step-by-step explanation:
=11-5=6
therefore =6
see them bellow
y=6-3x
first subtract 9x from 9x+3y=18
-9x -9x
so you get 3y=18-9x or 3y=-9x+18 then divide both sides by 3
so you get y=6-3x hope this helps :)
