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
How many tennis balls does Frodo have? ** Frodo has 8 tennis balls more than Lily (who has 3), so he has 8+3 = <<8+3=11>>11 tennis balls
How many tennis balls does Brian have? ** Brian has twice as many as Frodo, which makes 11*2 = <<11*2=22>>22 tennis balls.
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