Answer the following question, with explanation first.
Tom decides to make lasagna with all his beef. It takes twice as many noodles as beef. He has 10 pounds of beef. He already has 4 pounds of lasagna noodles and the noodles come in 2-pound packages. How many packages does he need to buy?

8
He needs 10 * 2 = 20 pounds of noodles.

That means he needs to buy 20 - 4 = 16 pounds of noodles.

So he needs to buy 16 / 2 = 8 packages.

.

Final answer: 8