I need to replace the faucet on my laundry tub and am having trouble figuring out how to get to the plumbing as it is inside the bracket that holds the tub to the wall. There are three screws holding on the tub one on top and one on each side. However, there is a bolt holding on the screws on the side and they spin when I try to remove them, and they are also inside the bracket which I can't reach. Any suggestions?

use a ridgid brand basin wrench to reach it without taking the laundry tub apart.