$16.98 with buy one get one 50% off (SHOW WORK)

Since we know that an object is 16.98, all we need to do is find what 50% is off the cost. Since 50% is half of the price, all we need to do is come up with the equation:

I added 16.98 at the end because you have to buy One *object* and get it with half price. The total with the discounted object is 25.47

Thank you! btw can i please get :3