This is another one of those problems that I kinda get the idea of how to do it but then just can't think of anything else. So, to the problem.
From here we know that since
Then I made
To get the value of x.
Now I go back to the given line and plug in:
My point is
I did most of it as I was writing this, I think my light bulb turned on.
Did I do it right or is there another way of doing this?