###Human: Brian has twice as many tennis balls as Frodo, who has 8 more than Lily. If Lily has 3 tennis balls, how many does Brian have?, ### Assistant: Frodo has 8 tennis balls more than Lily (who has 3), so he has 8+3 = 11 tennis balls
Brian has twice as many as Frodo, which makes 11*2 = 22 tennis balls. 
 So the answer is :  22