this is not maths, this is bs.
maths is played with symbols "boy" and "girl" and "money" and "gay" not actual depictions.
boy = girl
in your equation
but that means just :
x = y
or:
@ = %
or:
alpha = zeta
alpha and zeta are totally different to each other as x and y
a play on words (pun) in an actual argument it is a reasoning fallacy.
the theory behind the answer is invalid.
But with the latest us stock market downturn people may actually have thought
money = gay.
answer is erroneous due to the logic used to derive it.
got it?