Below is an instruction that describes a task. Write a response that appropriately completes the request in Japanese. Please answer in Japanese.

### Instruction:
 ユニスは中古車に7500ドルを費やしましたが、これは元の価格の25%引きです。車の元の価格はいくらでしょうか？


### Response:
 車の元の価格をxとします。
$7500 = (1 - 25%) * x
$7500 = (1 - 25%) * $7500
$7500 = (1 - 25%) * 7500
$7500 = 5625
$7500 = 7500 - 2500
$7500 = x - 2500
x = 7500 + 2500
x = $<<10000=10000>>10000