He wants to run 100 * .2 = 20 miles more than he used to. So he needs to run 100 + 20 = 120 miles. He is doing this in 280 / 7 = 40 weeks. So he needs to add 120 / 40 = 3 miles per week.
The answer: 3
Reverse engineering the question: James injured his ankle and decides to slowly start working back up to his previous running goals and then surpass them. Before the injury, he was able to run 100 miles per week. He wants to get up to 20% more than that total in 280 days and each week he will increase miles walked in the week by the same amount. How many miles does he need to add per week?

Currently, Mark is reading books for 2 * 7 = 14 hours weekly. His goal is to read books, for 14 + 4 = 18 hours during one week.
The answer: 18
Reverse engineering the question: Mark is reading books, for 2 hours each day. He decided to increase his time spent on reading books weekly, by 4 hours. How much time does Mark want to spend during one week on reading books?

He does 5 * 2 = 10 pull - ups a day. So he does 10 * 7 = 70 pull - ups a week.
The answer: 70
Reverse engineering the question: Mike decides to do more pull-ups to increase his strength for climbing. He uses the greasing the groove technique where every time he goes into a certain room he does 2 pull-ups. He decides to use his office. He goes in there 5 times a day every day. How many pull-ups does he do a week?

Let x be Luna's house rental budget. The total budget for house and food rental is represented by the equation x + (60x / 100) = 240. The equation becomes 100x + 60x = 24000 after multiplying each term by 100 to get rid of the fraction. By combining like terms, the equation becomes 160x = 24000. Thus, the value of x is 24000 / 160 = 150 which represents the house rental budget. So, Luna's food budget is $240 - $150 = $90. Her phone bill budget is $90 x 10 / 100 = $9. Therefore, Luna's monthly budget for all those expenses is $240 (house and food) + $9 (phone) = $249.
The answer: 249
Reverse engineering the question:
Luna's monthly food budget is equal to 60% of her house rental budget while her phone bill budget is 10% of her food budget. If the total budget of house rental and food budget is $240, how much is Luna's total monthly budget to pay all those expenses?