The price of a computer was $1,200 after applying a 20% discount. What was the original price of the computer?
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Answer:

The original price of computer was $1500.

Step-by-step explanation:

Given:

The price of a computer was $1,200 after applying a 20% discount.

Now, to get the original price of the computer.

Let the original price be [tex]x[/tex].

As given discount is 20%.

So, the price after discount = $1200.

Thus, $1200 is 80% of the price of computer. (100% - 20% = 80%.)

So, $1200 is equivalent to 80%.

And, [tex]x[/tex] is equivalent to 100%.

Now, by using cross multiplication we get the original price of computer:

⇒  [tex]\frac{1200}{80} =\frac{x}{100}[/tex]

⇒  [tex]120000=80x[/tex]

Dividing both sides by 80 we get:

⇒  [tex]1500=x[/tex]

Therefore, the original price of computer was $1500.