algebra word problem

Question

A dress priced at $21.42. The store is having a 30%-off sale. What was the original price of the dress?

Answer 1

1 - .3 = .7 (The dress costs 70% right now)

.7x = 21.42 (the discounted price is $21.42)

Isolate x:

x = 21.42 / .7

x = 30.6

 

So the dress was originally $30.60