ĐKXĐ: \(\left\{{}\begin{matrix}3x-1>=0\\4-x>=0\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}x>=\dfrac{1}{3}\\x< =4\end{matrix}\right.\)
=>\(\dfrac{1}{3}< =x< =4\)
\(\sqrt{3x-1}-\sqrt{4-x}=0\)
=>\(\sqrt{3x-1}=\sqrt{4-x}\)
=>3x-1=4-x
=>3x+x=4+1
=>4x=5
=>\(x=\dfrac{5}{4}\left(nhận\right)\)