Question 349582
the sum of angles can be two kind, since we don't know which is the angle appearing twice
 
y+x+x=180, y=30+x, hence 30+3x=180 => 3x=150 => x=50°(,50°), y=80°
   
or 
 
y+y+x=180, y=30+x, 60+2x+x=180 => 3x=120 => x=40°, y=70°,(70°)