Answer
8x + 250 = 410 (20 people is x)
Explanation:
okay so lets put this in a way that is easy to understand
8x (because it cost $8 per person)
8x +250 = 410
(250 is the price to rent the roller rink but not the total and the total is 40)
first you subtract 250 from both sides like this: 8x + 250 - 250 = 410 - 250
you should get 8x = 160
now you dived 160 by 8 it should look like this 8x/8 = 160/8
once you divide that you should get x = 20
to check it do 8 * 20 + 250
8 * 20 = 160 + 250 = 410
so your answer is 20 people