Question: I would love to understand how to solve this problem: Augustus can make 3 milkshakes per hour while Luna can make 7 milkshakes per hour. If Augustus and Luna have been making milkshakes for 8 hours now, how many milkshakes have they made?
Can you explain?
Answer: 
Augustus and Luna can make a total of 3 + 7 = 10 milkshakes per hour.
Therefore, they made a total of 10 x 8 = 80 milkshakes in 8 hours.