Answer:
x = 20 degrees
Step-by-step explanation:
All three angles added together form a straight line. A straight line is 180 degrees
3x+ 80 + 2x = 180
Combine like terms
5x+80 = 180
Subtract 80 from each side
5x+80-80 = 180-80
5x= 100
Divide each side by 5
5x/5 = 100/5
x = 20
x=20
You make an equation knowing that the angles add up to 180.
80+5x=180---> 5x=100----> x=20
Please write a comment if I am wrong.
Hope this helped you!
