You are shipping some books to a friend. A small box will hold 6 books. A large box will hold 18 books. You shipped a total of 54 books
in 5 boxes. How many small boxes and how many large boxes did you
use? Define the variables that you use to write the system.

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters