Welcome!
Try writing the equation like this.
T = 26-25
Now, you need to simplify.
T= 1
You should get your final answer T = 1
You want to get T by itself, so you subtract 25 by itself to make it go away, but whatever you do to any side, you have to do it on the other side.
I apologize for the edits & mistakes I made. I've fixed them.
Sorry for any disturbance.