Answer:
Because you didnt pay for brainly.
If you do, no adds :D
Its a lot easier to be honest
Check the picture below.
make sure your calculator is in Degree mode.
I believe you multiply by V
8x + 3× + 9x = 180
20x = 180
x = 180/20
x = 9
The smallest angle is: 3×9 = 27 degrees
Note: 180 degrees is the sum of angles in a triangle