Timothy tried to solve an equation step by step.
$\qquad\begin{align}
9\left(2x+\dfrac13\right)&=39\\\\
\\
18x+3&=39&\green{\text{Step } 1}\\\\
\\
18x&=36&\blue{\text{Step } 2}\\\\
\\
x&=2&\purple{\text{Step } 3}\\\\
\end{align}$
**Find Timothy's mistake.**
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