Brody wants to ride his bicycle 60 miles this week. He has already ridden 12 miles. If he rides for 6 more days, which equation could be used to determine xx, the average number of miles he would have to ride to meet his goal?
(60 - 12) ÷ 6 because you need to subtract the miles he's already ridden and then if you want to split the remaining miles evenly across 6 days, you then divide the difference of 60 - 12.