x-3y=9.. I've tried isolating y but it's gotten to the point i confused myself and have gotten two different answers, my last being y=x-9 over -3

Question

nnesha · Answer

first step
*)subtract 
x both side

nnesha · Answer

|dw:1427001656003:dw|
what you should get when you subtract x both side 
what sign suppose to be at right side ?

anonymous · Answer

$$x-3y=9$$$$x-9=3y$$$$3y=x-9$$
Now divide both x and -9 by 3.
You should get$$y=\frac{ 1 }{ 3 }x-3$$as your answer.

anonymous · Answer

@nnesha, i'm still confused because that's what i did and im still getting the same answer.. this is what ive been doing|dw:1427002560565:dw|