Aused bookstore will trade 2 of its books for 3 of yours. if val bring in 18 books to trade, how many books can she get from the store

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

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

What’s 8y+48 and factor each expression completely