\(\dfrac{3x+2}{4}=\dfrac{16}{3x+2}\)
`=> (3x+2)^2 =4.16`
`=> (3x+2)^2 = 64`
`=> (3x+2)^2 = +- 8^2`
\(\Rightarrow\left[{}\begin{matrix}3x+2=8\\3x+2=-8\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}3x=6\\3x=-10\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=2\\x=-\dfrac{10}{3}\end{matrix}\right.\)