Genevieve needs to buy some uniform shirts for her new job. Store A sells uniform shirts for $12 each. Store B sells uniform shirts for $14.50 each. Genevieve has a coupon for $10 off her purchase at Store A and another coupon for $20 off her purchase at Store (8.8A) Which equation can be used to determine the number of shirts Genevieve must buy to make the total cost the same between Store A and Store B?