if you can explain that would be great

Answer:
D
Step-by-step explanation: the answer is d because the other half without the equations is = to 180 which is a semi circle. This means that the other half must be 180 too because a circle is 360. I did trial and error and plugged in all the numbers.
Hope I could help!
Answer:
option D .35
Step-by-step explanation:
2x+3x+5=180 linear pair
5x=180-5
x=175/5=35