Question 1014667
Angle 1 and angle 2 are of equal measure, because they are alternate interior angles.  This means  {{{6x+y-4=x+9y+1}}}.


Sum of the measures of angles 2 and 3 is 180 degrees because they are supplementery.  This means  {{{x+9y+1+11x+2=180}}}.


Do you now know what to do?