<PRE><B>Question 389584</B>
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Hi
Let x represent the number added to both numerator and denominator
Question States***
 {{{(7+n)/(11 + n) = 3/4}}}
Cross multiplying to solve for n
   4n + 28 = 3n + 33
        n = 5

CHECKING our Answer***
  12/16 = 3/4</PRE>