|x+5|=3x-2

* Hướng dẫn giải

$\begin{array}{l}\left|x+5\right|=3x-2\left(9\right)\\ +)x\ge -5\Rightarrow \left(9\right)\iff x+5=3x-2\iff x=\frac{7}{2}(tm)\\ +)x<-5\Rightarrow \left(9\right)\iff -x-5=3x-2\iff x=-\frac{3}{4}(ktm)S=\left\{\frac{7}{2}\right\}\end{array}$