Question

If a couch cost $640 after a 20% discount

Answer 1

Assuming we are being asked to find the original price of the couch, we have the following, where x is the original price of the couch:

`$\$640 = 80\%\cdot x$`

`$\$640 = 0.8x$`.

Dividing both sides by 0.8, we get our final answer:
`x=\$800`.

So, the original price of the couch is 800 dollars.

Hope this helps! :)