Not sure what you are asking. It looks like you're given and you're trying to find ? If so:
If we let and swap the variables (which is what it looks like you did) we get:
I need help on what seems very simple
f-1(x)=1/(x+6).. so at first I tried simple replace to get the inverse..
then the inverse making the answer y+6 to no avail.
can you help me understand where I went wrong?