Heya!
Answer:
x° = 0°
Explanation:
x°+ 65° + 109° + 136° = 310°
Add all of the degrees on the left side together.
x° + 310° = 310°
Subtract 310° from both sides.
x° + 310° = 310°
- 310° - 310°
+ 310° and - 310° cancel out. 310° - 310° is 0.
x° = 0°
So, x° = 310° is your answer.
Hope this helped! :D