Question 1160236
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You can solve the problem and get the answer <U>following exactly instructions in your post</U>. 


<pre>
You start from this equation

    a = {{{7/(8x+10)}}}


which implies


    8ax + 10a = 7

    8ax = 7 - 10a

      x = {{{(7-10a)/(8a)}}}.


Now you see that for EVERY value of "a", not equal to zero, you may find the solution x, according to this formula.


It EXACTLY means that the range of the function f(x) is the set of all real numbers, EXCEPT of  {0}.
</pre>

Solved.


It is absolutely &nbsp;NORMAL, &nbsp;REGULAR &nbsp;and &nbsp;LEGAL &nbsp;way to solve the problem and to get the answer.