`|x+x|-2=6`
`⇒ |2x|=6+2`
`⇒ |2x|=8`
`⇒` \(\left[ \begin{array}{l}2x=8\\2x=-8\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=8÷2\\x=-8÷2\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=4\\x=-4\end{array} \right.\)
Vậy `x=4` hoặc `x=-4`
Xin hay nhất !
