a; =>|3x-5|=10
=>3x-5=10 hoặc 3x-5=-10
=>3x=15 hoặc 3x=-5
=>x=5 hoặc x=-5/3
b: =>|2x-3|=12-x-2=10-x
\(\Leftrightarrow\left\{{}\begin{matrix}x< =10\\\left(2x-3-10+x\right)\left(2x-3+10-x\right)=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x< =10\\\left(3x-13\right)\left(x+7\right)=0\end{matrix}\right.\Leftrightarrow x\in\left\{\dfrac{13}{3};-7\right\}\)
3: =>|3x-1|=6-2x
\(\Leftrightarrow\left\{{}\begin{matrix}x< =3\\\left(3x-1-6+2x\right)\left(3x-1+6-2x\right)=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x< =3\\\left(5x-7\right)\left(x+5\right)=0\end{matrix}\right.\Leftrightarrow x\in\left\{\dfrac{7}{5};-5\right\}\)
