Mkay, so this is a fairly easy equation.
So the starting equation is 6x- 3y=18
and -6 to both sides to cancel out 6x
sooo, it would look like this:
6x-3y=18
-6 -6
-3y=18- 6x
Now, your going to divide each side by -3
and it would look like this:
-3y=18-6x
3 3
so, y= -6 + 2x
I hope that all made sense and helped you darling!!