OK so i have
I think I should rewrite it as follows then what?
and I need help with
First the LaTeX code. Instead of using \bullet I'd use \cdot. It looks a bit nicer.
For the sake of clarity, I'd multiply both sides by . This step is not vital and you can easily alter the substitution I'm going to use.
So the equation is going to be:
Now let . This gives
Solve this then back substitute to get x.
-Dan