a, \(\dfrac{x+3}{2021}+1+\dfrac{x+2}{2022}+1+\dfrac{x+1}{2023}+1=0\)
\(\Leftrightarrow\dfrac{x+2024}{2021}+\dfrac{x+2024}{2022}+\dfrac{x+2024}{2023}=0\)
\(\Leftrightarrow\left(x+2024\right)\left(\dfrac{1}{2021}+\dfrac{1}{2022}+\dfrac{1}{2023}\ne0\right)=0\Leftrightarrow x=-2024\)