everything in the store was 20% off. What was the original price of a computer, if its sale price was 640$

Question

please help me if you can i need the answer

Answer 1

Original price - discount price = sale price.

 

This is because when you have a discount, the price is being decreased.

 

Let x = original price

 

Discount price is 20% of the original price.

 

 

x - 0.20x = 640

 

0.80x = 640

      x = 800

 

The original price was $800.