[Question]While shopping, Greg spent 300$ on a shirt and shoes. If Greg spent 9 more than twice as much on shoes as he did a shirt, how much did Greg spend on a shirt?
[Answer]Let x be the amount spent on a shirt. Greg spent 2x + 9 dollars on shoes. 300 = x + (2x + 9). 300 = 3x + 9. 291 = 3x. x = 97$. Greg spent 97$ on a shirt. The answer is 97.
Q: Anderson makes mud masks for spa treatments. In every batch of mud that he mixes, he adds three sprigs of mint, and he adds two green tea leaves for every sprig of mint. He had to switch to a different kind of mud, which makes the other ingredients he adds half as effective. How many green tea leaves should Anderson add to a new batch of mud to get the same efficacy as before?
A: Anderson adds 3 * 2 = 6 green tea leaves in every batch of mud. They are half as effective in the new mud, so Anderson should ad 6 * 2 = 12 green tea leaves to get the same efficacy as before. The answer is 12.
Question: A soccer ball takes twenty minutes to inflate. Alexia and Ermias are inflating balls, with Alexia inflating 20 balls and Ermias inflating 5 more balls than Alexia. Calculate the total time in minutes they took to inflate all the soccer balls.
Answer: To inflate a soccer ball, it takes 20 minutes, and if Alexia inflated 20 soccer balls, she took 20 * 20 = 400 minutes. Ermias has 5 more soccer balls than Alexia, meaning she has a total of 20 + 5 = 25 soccer balls. If each soccer ball takes 20 minutes to inflate, Ermias took 25 * 20 = 500 minutes to inflate all the soccer balls she had. Alexia and Ermias took 400 + 500 = 900 minutes to inflate all the soccer balls. The answer is 900.
[Question]Mark wants to order a pair of slippers for his wife with her initials embroidered on top. The slippers are currently $50.00 and are 10% off. The embroidery will be $5.50 per shoe and shipping is a flat rate of $10.00. How much will the slippers cost?
[Answer]The slippers are $50.00 and currently 10% off so that’s 50 * .10 = $5.00 discount. The slippers are $50.00 with a $5.00 discount which makes them 50 - 5 = $45.00. The embroidery will be $5.50 per shoe, and 2 shoes make a pair so it will cost 5.50 * 2 = $11.00. The shoes are on sale for $45.00, the embroidery will be $11.00 and the shipping is $10.00 for a total of 45 + 11 + 10 = $66.00. The answer is 66.
Q: Marcy keeps a 2-liter bottle of water by her desk. She takes a sip every five minutes, and each sip is 40 ml. How many minutes does it take her to drink the whole bottle of water?
A: First find the total number of milliliters in the bottle: 2 liters * 1000 ml / liter = 2000 ml. Then divide the total number of milliliters by the amount she drinks per sip: 2000 ml / 40 ml = 50 sips. Then multiply the number of sips by the time per sip to find the time it takes her to drink the bottle: 50 sips * 5 minutes / sip = 250 minutes. The answer is 250.
Question: Max likes to collect model trains. He asks for one for every birthday of his, and asks for two each Christmas. Max always gets the gifts he asks for, and asks for these same gifts every year for 5 years. At the end of the 5 years, his parents give him double the number of trains he already has. How many trains does Max have now?
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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Max gets 1 + 2 = 3 trains per year. He repeats this for 5 years, meaning he gets 5 * 3 = 15 trains. When this number is doubled by his parents, it becomes 15 * 2 = 30 trains. Since he already had 15 model trains, his total becomes 15 + 30 = 45 trains. The answer is 45.