Scrap or Keep? I'm looking for recommendations on this Felt road bike

I recently inherited a bunch of bike stuff. Probably two full bikes and 3 others I've had to completely reassemble. One of those is a 2010 Woman's Felt ZW100. Unlike the other bikes, I only have about 80% of it and upon further inspection the rear brake bridge was removed so I don't see a way to install a rear brake. I've heard of people only riding with one front brake but it seems a bit odd for a road bike. Does anyone know of another brake system that can be installed in the rear or is it truly not needed?

https://preview.redd.it/ae8wc65330ga1.jpg?width=480&format=pjpg&auto=webp&v=enabled&s=38e0728a3fd97734a6d455ef5b332520a2c59873

https://preview.redd.it/r0g2p65330ga1.jpg?width=640&format=pjpg&auto=webp&v=enabled&s=7d1a953e8008f8bf12e6084a8b9d3d07bd87018a