Question: Find the answer to this math problem: Pancho walks 20 miles a day. Except on weekends when he walks 10 miles. How many miles does he walk in a week?
Answer: 
He walks 100 miles during the weekdays because 5 x 20 = 100
He walks 20 miles on the weekend because 2 x 10 = 20
He walks 120 miles total because 100 + 20 = 120