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 B.

Write an

equation that can be used to determine s, the number of uniform shirts Genevieve can buy to

make the total purchase price the same for each store.