Tìm x biết: $\frac{1}{4x-2010}+\frac{1}{5x+2008}=\frac{1}{15x-2011}-\frac{1}{6x-2009}$
$pt\Leftrightarrow \frac{1}{5x+2008}+\frac{1}{6x-2009}=\frac{1}{15x-2011}-\frac{1}{4x-2010}$
$\Leftrightarrow \frac{11x-1}{(5x+2008)(6x-2009)}=\frac{11x-1}{(15x-2011)(4x-2010)}$ ...
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