Q: A store decides to shut down and sell all of its inventory. They have 2000 different items which would normally retail for $50. They are offering an 80% discount and manage to sell 90% of the items. They owed $15000 to their creditors. How much money do they have left after the sale?
A: They sold 2000 * .9 = 1800 items. They offered a 50 * .8 = $40 discount. That means that each item sold for 50 - 40 = $10. So they made 1800 * 10 = $18,000. So they had 18,000 - 15,000 = $3,000 leftover. The answer is 3000.

Q: Nancy buys 2 coffees a day. She grabs a double espresso for $3.00 every morning. In the afternoon, she grabs an iced coffee for $2.50. After 20 days, how much money has she spent on coffee?
A: She gets a double espresso for $3.00 every morning and an iced coffee for $2.50 in the afternoon so she spends 3 + 2.5 = $5.50 every day on coffee. After 20 days, she spends 20 * 5.5 = $110.00 on coffee. The answer is 110.

Q: Agnes is 25 years old and her daughter, Jane is 6 years old. In how many years will Agnes be twice as old as Jane?
A:
Let the number of years after which Agnes will be twice as old as Jane be x. After x years, 25 + x = 2(6 + x). Solving the equation by expanding and collecting like terms gives: x - 2x = 12 - 25. Further solving gives: - x =  - 13. Multiplying both sides by - 1 gives x = 13. The answer is 13.