Question 1160310
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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}.


In the form of inequality, the range is the set  of all real values of y, not equal to 0

      { y =/= 0 },   or, equivalently,   {y < 0  or  y > 0}.      <U>ANSWER</U>
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Solved.