HELP Find the value of x

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

5/6+7/8what is the answer sealsdbdbshd