Question 1206843
<pre>
I'm always suspicious about problems like this.

The way you have it, with no parentheses, it means this

{{{643x-expr(1/16)x+2=256*expr(x/42)*x}}}

which has approximate solutions x≈-0.0031106305 and x≈105.4850442

using a TI-84 Plus CE calculator:

But my experience with students' failure to understand 
how to type mathematical expressions all on one line,
tells me that you might have meant this:

{{{(643x-1)/(16x+2)=(256x)/(42x)}}}


or

{{{643x-1/(16x+2)=256expr(x/42)*x}}}

or

{{{(643x-1)/(16x)+2=256expr(x/42)*x}}}

or some other ways.

So I'm not going to attempt the other ways. They
all have different solutions.

Edwin</pre>