The sales price of a car is $12,590, which is 20% off the original price. What is the original price?

I will be happy to critique your thinking.

If 12590=.80x, ....

To find the original price, you need to determine the price before the 20% discount was applied.

Here's how you can calculate it step by step:

Step 1: Define the sales price (SP) as $12,590.

Step 2: Determine the discount percentage, which in this case is 20%.

Step 3: Calculate the discount amount by multiplying the sales price by the discount percentage:

Discount amount = SP * (discount percentage / 100)
Discount amount = $12,590 * (20 / 100) = $2,518

Step 4: Subtract the discount amount from the sales price to find the original price (OP):

OP = SP - Discount amount
OP = $12,590 - $2,518 = $10,072

Therefore, the original price of the car was $10,072.