\(5\sqrt{12x}-4\sqrt{3x}+2\sqrt{48x}=14\)
\(\Leftrightarrow5.2.\sqrt{3x}-4.\sqrt{3x}+2.4.\sqrt{3x}=14\)
\(\Leftrightarrow10\sqrt{3x}-4\sqrt{3x}+8\sqrt{3x}=14\)
\(\Leftrightarrow\sqrt{3x}\left(10-4+8\right)=14\)
\(\Leftrightarrow14.\sqrt{3x}=14\)
\(\Leftrightarrow\sqrt{3x}=1\)
\(\Leftrightarrow3x=1\)
\(\Leftrightarrow x=\frac{1}{3}\)