posted by xavier .
What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0
Reiny has done some of these for you. If you just want confirmation of your answer, what did you get?
If you still can't work them, see your previous posts and follow the steps; show us where you get stuck.