Noah and Brody just had business cards made. Noah's printing company charged a one-time setup fee of $20 and then $5 per box of cards. Brody, meanwhile, ordered his online. They cost $6 per box. There was no setup fee, but he had to pay $10 to have his order shipped to his house. By coincidence, Noah and Brody ended up spending the same amount on their business cards. How much did each spend?
I'm really not sure if there are steps to that problem, I used trial and error. Ultimately, 10 boxes each ended up being the common denominator if that helps at all