\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+20\right)=2023\)
\(20x+\left(1+2+3+...+20\right)=2023\)
\(20x+\dfrac{20\times\left(20+1\right)}{2}=2023\)
\(20x+210=2023\)
\(20x=2023-210\)
\(20x=1813\)
\(x=\dfrac{1813}{20}\)
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