Jack met Jill Jill had 16 gallons of water in a bucket jack has ? gallons of water in his bucket answer the equation to figure out how much gallons he has in his bucket. If 3 =B and C=2 A=1 What does D eqaul when you figure it out multiply the number that D is equal to 5 times then the number you end up with needs to be multiplied 12 times the number you get subtract 100 from it then you have your answer.