A dress is on sale for d dollars. The regular price is 3 times as much Jannie has enough my to buy 2 dresses at regular price how many dresses can Jannie buy at sale price

The regular price of the dress is 3d dollars.

Jannie has enough money to buy 2 dresses at the regular price, so she has 2(3d) = <<2*3=6>>6d dollars.
Therefore, Jannie can buy 6d/d = <<6=6>>6 dresses at the sale price. Answer: \boxed{6}.