The sentence 'Ouais tu as raison' means Yeah, you're right [or you're correct]. In the word-by-word translation, the adverb 'ouais' means 'yeah'. The personal pronoun 'tu' means 'you'. The verb 'as' means '[you] have'. And the noun 'raison' means 'reason'.
Ouais toi means 'yeah you' in French.
Raison d'être
tu es ma raison d'être, ma raison de vivre
ouais mec
"tu as quel âge" mean "how old are you" ;)
Ouais toi means 'yeah you' in French.
tu as raison / vous avez raison
tu es ma raison de vivre, tu es ma raison d'être
It means "I am afraid, you are right" in French.
tu es ma raison d'être, ma raison de vivre
Raison d'être
Tu a raison
You can say "Ouais, t'as raison !" in French to express "hell yeah, you're right!".
you are my reason for living
I believe it means "I am very happy because of you" or "You make me very happy"
Raison d'être means "reason to be / reason for being" in English.
In French, you can say "Tu es la raison pour laquelle je souris."