Question

lx-2016 l=x-2012

 

Answer 1

\(\left|x-2016\right|=x-2012\)

\(\Leftrightarrow x-2016=2012-x\left(x< 2016\right)\)

\(\Leftrightarrow2x=4028\)

hay x=2014(nhận)

Answer 2

lx-2016 l=x-2012

\(\left[{}\begin{matrix}x-2016=x-2012\\x-2016=-x+2012\end{matrix}\right.\)

\(\left[{}\begin{matrix}0x=2016-2012\left(bỏ\right)\\2x=2012+2016\end{matrix}\right.\)

\(2x=4028=>x=2014\)