If Brayan drinks 4 cups of coffee in an hour, twice what Ivory drinks, then Ivory drinks 4/2 = <<4/2=2>>2 cups of coffee in an hour.
Together, they drink 4+2 = <<4+2=6>>6 cups of coffee in an hour.
After 5 hours, they will drink 5*6 = <<5*6=30>>30 cups of coffee together.
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