Đáp án:
$ {\left[\begin{aligned}x=\dfrac{-21}{4}\\x=\dfrac{-27}{4}\end{aligned}\right.}\\$
Giải thích các bước giải:
$10)
\dfrac{\left | x+6 \right |}{2}=\dfrac{3}{8}\\
\Leftrightarrow \left | x+6 \right |=\dfrac{3}{8}.2=\dfrac{3}{4}\\
\Leftrightarrow {\left[\begin{aligned}x+6=\dfrac{3}{4}\\x+6=\dfrac{-3}{4}\end{aligned}\right.}\\
\Leftrightarrow {\left[\begin{aligned}x=\dfrac{3}{4}-6\\x=\dfrac{-3}{4}-6\end{aligned}\right.}\\
\Leftrightarrow {\left[\begin{aligned}x=\dfrac{3}{4}-\dfrac{24}{4}\\x=\dfrac{-3}{4}-\dfrac{24}{4}\end{aligned}\right.}\\
\Leftrightarrow {\left[\begin{aligned}x=\dfrac{-21}{4}\\x=\dfrac{-27}{4}\end{aligned}\right.}\\$
