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April 8th, 2015, 07:47 AM  #1 
Member Joined: Mar 2015 From: KY Posts: 35 Thanks: 1  Rational Expression
C is the correct answer, but I can't work it out to get it. Can anyone help? 
April 8th, 2015, 08:03 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,771 Thanks: 1426 
$\displaystyle \frac{1}{12x}  \frac{1}{2x}$ common denominator is $(12x)(2x)$ ... $\displaystyle \frac{1(2x)}{(12x)(2x)}  \frac{1(12x)}{(2x)(12x)}$ finish it 

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