There is increasing interest in touring the place of your birth- the places you played, the places you ate, the stores where your food was purchased. And who better to give such tours than you? You decide to charge $50 per person. But that is a bit excessive, so you decide to give group discounts of $1 per person. In other words, if two people go on one tour, you will charge $49 per person(for a total of $98) and if three people go on the tour you will charge $48 per person(for a total of $144)
How many people have to go on the tour in order for you to make $700?