Answer:
29 degrees
Step-by-step explanation:
angle ABD = (x + 9) degrees
angle DBC = (2x - 19) degrees
angle ABC = angle ABD + angle DBC
50 = (x + 9) + (2x - 19)
= 3x - 10
3x = 50 + 10
x = 60/3
x = 20
Substitute x = 20 into angle ABD = (x + 9)
angle ABD = 20 + 9
angle ABD = 29 degrees
