Answer: The number of campers who did not return to camp this year = 50.
Explanation:
Given : The equation 475= 525- c shows the decrease in the number of campers returning to camp from one year to the next.
Number of campers returning to sports camp this year = 475
Number of campers attended sports camp = 525
Now, from the given equation, c = 525-475 = 50 [Intercahange position of 425 and c]
So, c = 50 implies the number of campers who did not return to camp this year = 50.