Take the time to be polite and actually ask a question, preferably in full sentences....
I THINK what you want to do is put the given equation in the specified form, Ax+By=C.
If that is it, then all you need to do is get the constant on the right side by adding 6 to both sides of the given equation.
9x+3y-6 = 0
+6 +6
------------
9x+3y = 6
ANSWER: 9x+3y = 6