Active job

Carpet patch work where a fire place and walls were removed

We have two sections in our lounge/dining where two walls and a fire place were removed leaving bare concrete. The bricks will be removed on Tuesday. We have enough carpet to do a big square replacement where the walls were removed. We need this repaired as soon as possible. We have the carpet and underlay lifted from another room that can be used. Is it possible to patch these sections without doing the whole lounge dining?