Q: A farmer has twice as many pigs as cows, and 4 more cows than goats. If the farmer has 56 animals total, how many goats does he have?
A: Let x be the number of goats. Cows:4 + x. Pigs:2(4 + x) = 8 + 2x. Total:x + 4 + x + 8 + 2x = 56. 4x + 12 = 56. 4x = 44. x = 11 goats. The answer is 11.

Q: Mike has earned a total of $160 in wages this week. He received the wages for his first job, then later received the wages from his second job where he works 12 hours a week. If his second job pays $9 per hour then how much money, in dollars, did Mike receive from his first job?
A: From his second job, Mike receives $9 / hour * 12 hours = $108. He therefore earned $160 – $108 = $52 from his first job. The answer is 52.

Q: On Saturday morning, Renata had $10 to spend. She first went and made a $4 donation in exchange for a ticket to the local charity draw. When the draw was done, she was declared the winner of the 5th prize of $90. Excited, she quickly dashed to play slots at one of the casinos in Atlantic City. Unfortunately, she lost $50 at the first slot machine, $10 at the second and $5 at the last one. Dejected, she decided to take a long walk. She soon grew thirsty and entered the first gas station she saw. She picked a $1 bottle of water and while paying for it, she bought a $1 lottery ticket. To her utter delight, she won an instant prize of $65. How much money did Renata end up having?
A:
After the charity ticket purchase on Saturday morning, Renata remained with 10 - 4 = 6 dollars. Adding the prize money give her 6 + 90 = 96 dollars. At the casino, she lost 50 + 10 + 5 = 65 dollars. Thus far, Renata remained with 96 - 65 = 31 dollars. The amount she spent on the bottle of water and lottery ticket is 1 + 1 = 2 dollars. This means that she remained with 31 - 2 = 29 dollars. Since she won 65 dollars, Renata’s ended up having 29 + 65 = 94 dollars. The answer is 94.