Let x be the price, in dollars. The condition says- = 2. To simplify, divide both sides by 2 - = 1. (1) At this point, you may guess the answer MENTALLY: x = 0.50 dollars per item. ANSWER. The price per item is $0.50. The number of items bought is = 6. CHECK. I will check equation (1). Its left side is - = 6 - 5 = 1. ! Correct !