Answer:
Explanation:
Since all the angles in a triangle add up to 180, you would need to add up the 2 values you have to get the third:
∠3 = 180-82-29 
 = 69 degrees 
Now you have to subtract this value from 180 because a straight line is 180 degrees: 
∠x = 180-69 
∠x = 111°
Hope this helps!