YOU SAID:

what's up brother, you doing good?

INTO JAPANESE

元気ですか、元気ですか？

BACK INTO ENGLISH

How are you, how are you?

INTO JAPANESE

お元気ですか、元気ですか？

BACK INTO ENGLISH

How are you?

INTO JAPANESE

お元気でしたか？

BACK INTO ENGLISH

How are you?