62 points brainliest for correct answer please help

Answer:
16. y=108 180-36-36=108
17. w=40. 180-23-117=40
18. x=50. 30+2x+x=180
19. y=18. 4y+y+90=180
20. w=60. w+w+10+50=180
Step-by-step explanation:
all of the angles in a triangle need to add up to 180