Answer:
6 dresses
Explanation:
Given: sales price is $d
Regular price is 3 times of sales price
Janine has money to buy 2 dresses at regular price.
Now, finding the number of dresses Janine can buy at the sales price, if sale price is d
Regular price=

Janine has total money=
(∵ regular price is 3d)
∴ Number of dresses bought by Janine=

⇒ Number of dresses bought by Janine=

∴ Number of dresses bought by Janine is 6.