How do I find x as a function of x? Sorry for the title, I don't know how else to put this into words.
Basically I wanted to know how to get the result below:

I have no idea about why the graph is showing X as a diagonal line. How can X by itself be a line which is not constant?

Here you want to solve $$x=462+0.085x$$
There are two equations $y=x$ and $y=462+0.085x$.
Solving for $x=462+0.085x$ is equivalent to determining the solutions for the system $$y=x \text{  (Denoted by Blue Line)  }$$
&
$$y=462+0.085x\text{  (Denoted by Red Line)  }$$
The point of intersection of those two lines is your solution.
Now we proceed to find the solution.
$$(1-0.085)x=462$$
$$0.915x=462$$
$$x=\frac{462}{0.915}=\frac{30800}{61}$$
