To solve this problem you must follow the proccedure below:
1. It is important to know that the sum of the interior angles of a triangle is 180 degrees. You have that one corner is 60 degrees the other is 40 degrees and the other corner x+92. Then, you have:
60+40+(x+92)=180
2. Now, you must clear the variable "x", as below:
60+40+(x+92)=180
192+x=180
x=180-192
x=-12
3. The other corner is:
=x+92
=-12+92
=80°
