Equating the given angles, we will get x as 23.
Step-by-step explanation:
Since it is given that ray BD bisects ∠ABC, we can say that the angles <DBC and <ABD are equal.
Equating the angles, we will get,
<DBC = <ABD
(x+ 8)° = (2x-15)°
Grouping the terms, we will get,
2x-x = 8+ 15
x = 23