Question

tim x biet

2009-/x-2009/=x

Answer 1

/x-2009/=2009-x\(\Rightarrow\)x-2009< hoạc = 0\(\Rightarrow\)x< hoạc = 2009

Answer 2

\(2009-\left|x-2009\right|=x\Rightarrow\left|x-2009\right|=2009-x\)

ĐK: \(x\ge2009\)

\(\Rightarrow\orbr{\begin{cases}x-2009=2009-x\\x-2009=x-2009\end{cases}\Rightarrow\orbr{\begin{cases}x=2009\left(tm\right)\\0=0\left(loại\right)\end{cases}}}\)