Answer:
Step-by-step explanation: You would do 5x+20+x+40=180
Then you would add 5x and x together and you would also add 20 and 40 together and then you get: 6x+60=180
You would then subtract 180-60 and then you should get 6x=120 and the you would divide from both sides and you should get x=20 you would then plug it into both angles So 5(20)+20 and you should get 120 for the left angle and then you would do the next angle which would be 20+40=60 for the right angle
Short version:
5x+20+x+40=180
6x+60=180
6x=120
X=20
