If 9/(1 + 4/x) = 1, then x =
Choose the correct choice from the following answers
A) 3  B) 1/2  C) 1/3  D) -1/3  E) -3
The expression 9/(1 + 4/x) = 1should have been equal to something .   If 9/(1 + 4/x) = 1 = 1   =&gt; 9x/(x + 4) = 1   =&gt; 9x = x + 4   =&gt;8x = 4   =&gt;x = 1/2   Correct Option : 1/2
<result>B</result>
If 9/(1 + 4/x) = 1, then x =