✅ Após resolver a equação do primeiro grau, concluímos que seu conjunto solução é:
[tex]\Large\displaystyle\text{$\begin{gathered}\boxed{\boxed{\:\:\:\bf S = \{9\}\:\:\:}}\end{gathered}$}[/tex]
Resolvendo equação do primeiro grau:
[tex]\Large\displaystyle\text{$\begin{gathered}\tt 2x - 9 = 9\end{gathered}$}[/tex]
[tex]\Large\displaystyle\text{$\begin{gathered}\tt 2x = 9 + 9\end{gathered}$}[/tex]
[tex]\Large\displaystyle\text{$\begin{gathered}\tt 2x = 18\end{gathered}$}[/tex]
[tex]\Large\displaystyle\text{$\begin{gathered}\tt x = \frac{18}{2}\end{gathered}$}[/tex]
[tex]\Large\displaystyle\text{$\begin{gathered}\tt x = 9\end{gathered}$}[/tex]
✅ Portanto, o conjunto solução é:
[tex]\Large\displaystyle\text{$\begin{gathered}\tt S = \{9\}\end{gathered}$}[/tex]
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