QUESTION
APC = PDP, Prove ?

ANSWER
Since we know they are both parties, The 2nd "P" in PDP is a constant and so may not be included in the equation. OR we may as well say APC"P" = PD"P"
"P" = Party
Divide both sides of the equation by the constant "P".
Resulting in APC = PD
This means that if A+P+C = x, Also P+D must be equal to x
Meaning A+P+C = P+D
Using the alphabet A -Z numbers, whereby A = 1 and Z=26
Substituting letters with their corresponding numbers.
A,P,C = 1,16,3
P,D= 16,4
A+P+C = 1+16+3 = 20
P+D= 16+4 = 20

Therefore APC = PDP
QED.