I cannot figure out this problem, so here it is: Some students held a car wash. They charged $3 to wash the car. The students made a profit of $181 after they spent $11 dollars on supplies for the car wash.
How many cars did they wash? Please, if you get the answer, explain how you got it. (You think it would be a simple division problem, but here is the catch, if you get a decimal or a fraction, then you did it wrong and it is not the right answer!)
Thank you so much in advance!