Answer:
126 degrees
Step-by-step explanation:
We are given BC is congruent to BE therefore BDE is congruent to BDC. We can use this to solve for p:
9p-81=5p-17
Move like terms to one side
4p=64
Divide 4 from both sides
p=16
Therefore:
BDC=9(16)-81
BDC=144-81
BDC=63
CDE=BDC+BDE
CDE=2(63)
CDE=126 degrees
