Respuesta :

[tex]\begin{gathered} (3n-6)+(3n-6)+(3n-6)=180 \\ 3(3n-6)=180 \\ \text{Solve for n:} \\ 3n-6=\frac{180}{3} \\ 3n-6=60 \\ 3n=60+6 \\ 3n=66 \\ n=\frac{66}{3} \\ n=22 \end{gathered}[/tex]

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