Okay, after a 20% discount, the price of the TV is $479. Let's write out a little formula here. How about the cost of the TV minus, because you're going to be taking off a little bit, minus a 20% discount. would equal the sale price, what it's on sale for today. So original cost, if you want to add some words like that, whatever makes sense to you, that's what you want to write up here, your life experiences.
So the original cost of the TV is what we're looking for. We don't know what that amount is. But we know we can take...
20% off of the original price. And that will give me my sale price. And in this particular exercise, we do have the sale price.
It says $479.20. So back up over here, notice the word off. and we need to convert this percent.
We need to get rid of that symbol. So that would be x minus 0.2 or 0.20, either one. Remember you move it two places per hundred.
So divide by a hundred, scoot that over. Of the original price, multiply by the original price. You have an understood one sitting there as the coefficient.
Combine these like terms. What's 1 minus 0.2? You'd say 0.8 or 0.80, whichever doesn't really matter, is equal to 479.20.
To solve the exercise, we divide by the 0.80, and you get x is equal to, I'll just grab my calculator, 479.20 divided by point eighty the original price was five hundred and ninety nine dollars