[Question]Bethany is working at the front desk at Joe’s Gym. There were some people lifting weights when she started her shift. Then 5 more people came in and started running on the treadmill and 2 people left. There are now 19 people in the gym. How many people were lifting weights at the start of Bethany’s shift?
[Answer]We know that 5 people came in and 2 people left after Bethany’s shift started, so there was a net change of 5 – 2 = 3 people. If there are 19 people now in the gym and that is 3 more than when Bethany’s shift started, we know there were 19 – 3 = 16 people lifting weights at the start of her shift. The answer is 16.
Q: Jerry has three times as many stickers as George. George has 6 fewer stickers than his brother Fred. If Fred has 18 stickers, how many stickers does Jerry have?
A: George has 18 - 6 = 12 stickers. Jerry has 12 * 3 = 36 stickers. The answer is 36.
Question: Frank has an apple tree in his backyard. 5 apples are hanging on the tree and 8 have fallen to the ground. If Frank's dog eats 3 of the apples off of the ground, how many apples are left?
Answer: Frank originally had 5 + 8 = 13 apples. After his dog eats 3, there are 13 - 3 = 10 apples. The answer is 10.
[Question]Aren’s flight from New York to Hawaii will take 11 hours 20 minutes. He spends 2 hours reading, 4 hours watching two movies, 30 minutes eating his dinner, 40 minutes listening to the radio, and 1 hour 10 minutes playing games. How many hours does he have left to take a nap?
[Answer]The flight from NY to Hawaii will take 60 x 11 + 20 = 680 minutes. All the activities will take 120 + 240 + 30 + 40 + 70 = 500 minutes. For his nap, he has 680 - 500 = 180 minutes. To convert minutes to hours, he has 180 / 60 = 3 hours. The answer is 3.
Q: Barry has $10.00 worth of dimes. His little brother, Dan has half that amount but finds 2 more dimes on his way home from school. How many dimes does Dan have?
A: Dimes are worth $0.10 and Barry has $10.00 worth of dimes so he has 10 / .10 = 100 dimes. Dan has half the amount of dimes as Barry so Dan has 100 / 2 = 50 dimes. Dan finds 2 more dimes on his way home so he now has 50 + 2 = 52 dimes. The answer is 52.
Question: There are 19 marbles in a bowl, 5 of which are yellow. The remainder are split into blue marbles and red marbles in the ratio 3:4 respectively. How many more red marbles than yellow marbles are there?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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5 out of 19 marbles are yellow so the remainder which is 19 - 5 = 14 marbles are blue and red. 14 marbles are split into blue and red in the ratio 3:4 so each "share" is 14 / (3 + 4) = 2 marbles. There are 4 "shares" of red marbles which totals to 4 * 2 = 8 red marbles. There are 8 - 5 = 3 more red marbles than yellow marbles. The answer is 3.