Answer:
$18,000
Step-by-step explanation:
10% off means that the price is now 90% of the original price. In mathy terms if x is the original price, that means it's 0.90x of the price.
They tell us that the discounted price is $16,200. Hey! we've established that 0.90x is also the price after the discount, so we can equal them to each other: 16200 = 0.90x.
Now, we solve for x (the OG price)
16200/0.9 = x = 18000