Oh, they all work, just a tad slower. The QRH for example will tell you that you can expect asymmetric thrust reverser deployment during landing, the left one in your example will take considerably longer to deploy. The landing gear also takes long to retract, thats why there is the Landing Gear Transfer Unit that uses System B fluid and pressure to raise the gear in case of a failure of engine one during takeoff and the initial climb.
Oh, and I am assuming ENG 1 LOW PRESS, nothing else.