Help me with my pizza math problem

Question

me and two friends order a pizza and the total is 25 bucks we each have a ten we give the delivery driver a 2 dollar tip and we each get a dollar back so we each spent 9 on the pizza and nine times 3 equals 27 and the two dollar tip added on to that equals 29 so where did my other dollar go

Answer 1

you total was $25 plus the $2 tip not $27 +$2. So 30-9x3=3/3 =$1/ea.

Duh

Answer 2

The delivery driver pocketed it.  

Answer 3

Your $2 tip is included is $27.  Hence you don't add it again to $27./