Today, everything at a store is on sale. The store offers a 20% discount. The regular price of a shirt is x dollars, what is the discount price in dollars?

Answer:original cost - (percentage off)(original cost) = sale cost    x - 0.35x = 0.65x = sale cost Remember that x = 1x.    x - 0.35x = 1x - 0.35x = 0.65xStep-by-step explanation:et me give you another problem and see if you can figure it out.  A shirt is x dollars and it's on sale for 20% off.  Let's think about how you would figure this out in the store and turn it into an equation.  You take the original amount, multiply it by 20%, and subtract it from the original amount.  Remember that to turn a percent into a decimal, we move the decimal 2 places to the left,  So, we have x - .20x = the new price.  Now, remember that the old price is 100%, right?  What percent is the new price if we took 20% off?  80%, right?  So, we can either subtract x - .20x to get .80x, or we can take the 20% from the 100% to get the 80%, or .80x.