✅ Resolvendo equação do primeiro grau:
Seja a equação do primeiro grau:
[tex]\large\displaystyle\text{$\begin{gathered}3x - 5 = 16 \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}3x = 16 + 5 \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}3x = 21 \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}x = \frac{21}{3} \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}x = 7 \end{gathered}$}[/tex]
✅ Portanto:
[tex]\large\displaystyle\text{$\begin{gathered}x = 7 \end{gathered}$}[/tex]
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