Frank is making hamburgers and he wants to sell them to make $50. Frank is selling each hamburger for $5 and 2 people purchased 4 and another 2 customers purchased 2 hamburgers. How many more hamburgers does Frank need to sell to make $50? Give me reasons, before answering the question
Frank sold 4 hamburgers and then sold 2 more, so all together Frank already sold 4 + 2 = 6 hamburgers. If each hamburger is $5 and he sold 6 hamburgers already, Frank has made 5 * 6 = 30 dollars. Frank wants to make $50 and has already made $30, so Frank still needs 50 - 30 = 20 dollars. Since he needs $20 and each hamburger is $5, Frank needs to sell 20 / 5 = 4 more hamburgers. So the final answer is 4.