Well, the distributive property is that by which the multiplication of a number by a sum will give us the same as the sum of each of the addends multiplied by that number. We have then that the expression used by Gary: n = X * 17 Using the distributive property we have another way to rewrite the expression is: n = 17 * X Where, x: is the sum of all tickets sold. Answer: n = 17 * X