a: \(\Leftrightarrow2x-1=9\)
hay x=5
b: \(\Leftrightarrow\left|3x+2\right|=5\)
\(\Leftrightarrow\left[{}\begin{matrix}3x+2=5\\3x+2=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\\x=-\dfrac{7}{3}\end{matrix}\right.\)
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