If p and q are two non zero numbers and 18(p+q) = (18+p)q, which of the following must be true?

A.
q = 18 
B.
p 
C.
p = 18 
D.
q
Correct Answer: Option A
Explanation
If 18(p + q) = (18 + p)q
then 18p + 18q = 18q + pq
18p = pq (implies) q = 18.
If p and q are two non zero numbers and 18(p+q) = (18+p)q, which of the following must be true?
If 18(p + q) = (18 + p)q
then 18p + 18q = 18q + pq
18p = pq (implies) q = 18.