Answer: 20 days
Step-by-step explanation:
First find out the number of miles Carson rides every day.
If he goes at 12 every 3 days, in one day he goes:
= 12 / 3
= 4 miles per day
Going at 4 miles a day, the number of days it would take to ride 80 miles is:
= 80 / 4
= 20 days
