Help please the question is attatched:

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

Pls! does anybody know a shortcut for answering these types of questions in the future?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.