Respuesta :

[tex]\begin{gathered} \text{The length of the telivision is L,} \\ L=4w-3 \\ \end{gathered}[/tex]

Here, W is the width of the telivision.

The perimeter of the telivison is 864 cm.

[tex]\begin{gathered} 864=2(L+w) \\ 864=2(4w-3+w) \\ 432=5w-3 \\ 5w=435 \\ w=87 \\ \text{and, the length is} \\ L=4w-3 \\ L=4\times87-3 \\ L=345 \end{gathered}[/tex]