Respuesta :

Answer:

93

Step-by-step explanation:

By the definition of a midpoint, FG=GH.

[tex]16x-19=12x+9 \\ \\ 4x-19=9 \\ \\ 4x=28 \\ \\ x=7 \\ \\ GH=16(7)-19=\boxed{93}[/tex]