Question 44125
This is a simple matter of rearranging to give just x on one side of the equation:
4-(2x-9)=-19
4=(2x-9)-19
23=2x-9
32=2x
16=x
so the solution is x=16

I hope this helps 
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk