\(\dfrac{5}{x}+\dfrac{4}{x+1}=\dfrac{3}{x+2}+\dfrac{2}{x+3}\)
\(\Leftrightarrow\dfrac{5}{x}+1+\dfrac{4}{x+1}+1=\dfrac{3}{x+2}+1+\dfrac{2}{x+3}+1\)
\(\Leftrightarrow\dfrac{x+5}{x}+\dfrac{x+5}{x+1}-\dfrac{x+5}{x+2}-\dfrac{x+5}{x+3}=0\)
\(\Leftrightarrow\left(x+5\right)\left(\dfrac{1}{x}+\dfrac{1}{x+1}-\dfrac{1}{x+2}-\dfrac{1}{x+3}\right)=0\)
\(\Leftrightarrow x+5=0\)
\(\Leftrightarrow x=-5\)