Answer:
[tex]160[/tex] degrees.
Step-by-step explanation:
Line ABC is a straight line, and the angle on a straight line is always 180 degrees.
Since ABD + DBC = ABC, we know that [tex]x+8x=180[/tex]
[tex]9x=180[/tex]
Divide both sides by 9:
[tex]x=180\div 9=20[/tex]
DBC is [tex]8x=8\times 20=160[/tex] degrees.
