APB is congruent to DPC. Find $x$ [closed]

I wrote in $x+23$ for DPC but then I'm stuck heres the image since I can't embed:

APB is congruent to DPC.

APB is $x+23$

BPC is $x$

BPD = $4x - 39$

Which can be seen here:

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closed as not a real question by Did, William, no identity, Arkamis, Hagen von EitzenOct 15 '12 at 22:04

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Please, explain your problem. Write all details. –  Sigur Jul 1 '12 at 13:32
Edited and explained. –  user34548 Jul 1 '12 at 14:00

HINT: BPC + CPD = BPD. So we have that $2x + 23 = 4x - 39$. Solve for $x$.