I received a question this morning asking if it is possible to select and change the position of ends of more than one wall by dragging them at the same time. When I read this I imagined that the walls are parallel but they don't have to be.
The answer is, sure, hover over the end of a wall and use the TAB key to highlight the "shape handle" of the wall. This end line/edge of a wall is called its Shape Handle. Repeat that process and by using the CTRL key you can add the other shape handles to your selection till you are done.
Then either drag them or use the move tool. Dragging is not precise unless there is something you precisely you can drag "to". Move can be more precise because you can specify a distance.
Then again the Trim/Extend tool might take less effort?