Answer:
x° = 20°
Step-by-step explanation:
Since ∠3x°, ∠80° and ∠2x° are all supplementary angles we know the following is true...
3x° + 80° + 2x° = 180°
Now we just solve for x and get...
3x° + 80° + 2x° = 180°
5x° = 180° - 80°
5x° = 100°
x° = 100° / 5
x° = 20°
