:v

con của muỗi

Ko chấm mà anh

\(\dfrac{9}{16}:\dfrac{3}{8}=\dfrac{9}{16}\)x\(\dfrac{8}{3}=\dfrac{1.3}{1.2}=\dfrac{3}{2}\)

(''x'' là nhân nha)

\(\dfrac{x+4}{2008}+\dfrac{x+3}{2009}=\dfrac{x+2}{2010}+\dfrac{x+1}{2011}\)

<=> \(\left(\dfrac{x+4}{2008}+1\right)+\left(\dfrac{x+3}{2009}+1\right)=\left(\dfrac{x+2}{2010}+1\right)+\left(\dfrac{x+1}{2011}+1\right)\)

<=> \(\dfrac{x+2012}{2008}+\dfrac{x+2012}{2009}-\dfrac{x+2012}{2010}-\dfrac{x+2012}{2011}=0\)

<=> \(\left(x+2012\right)\left(\dfrac{1}{2008}+\dfrac{1}{2009}-\dfrac{1}{2010}-\dfrac{1}{2011}\right)=0\)

<=> \(x+2012=0\)

<=> x = -2012

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