An athlete trains for 105 min each day for as many days as possible. Write an equation that relates the number of days d that the athlete spends training when the athlete trains for 840 min.

Answer 1

Let d be the number of days the athlete trains.
Since the athlete trains for 105 min each day, the total number of minutes spent training for d days is 105d.
Since the athlete trains for 840 min, we can write the equation as:
105d = 840.
Thus, the equation that relates the number of days d that the athlete spends training when the athlete trains for 840 min is 105d = 840.