Answer: 27, I believe
Step-by-step explanation:
Sorry for the bad quality photo! You can write each unknown angle in function of another.
We have: 180-3x
180-(2x+72)
x
Then, add, and make the equation =180.
180-3x+180-2x-72+x=180
360-4x-72=180
-4x= 180-360+72
-4x= -108
x=27
