Answer :
It's very difficult to understand the question. In fact, I have
not achieved that lofty level yet.
-- If d = 12, then ( 4d - 24 - 12 ) is not equal to zero.
-- If ( 4d - 24 - 12 ) IS equal to zero, then d = 9, not 12 .
not achieved that lofty level yet.
-- If d = 12, then ( 4d - 24 - 12 ) is not equal to zero.
-- If ( 4d - 24 - 12 ) IS equal to zero, then d = 9, not 12 .