A paper company needs to ship paper to a large
printing business. The paper will be shipped in
small boxes and large boxes. The volume of each
small box is 7 cubic feet and the volume of each
large box is 14 cubic feet. A total of 21 boxes of
paper were shipped with a combined volume of
252 cubic feet. Write a system of equations that
could be used to determine the number of small
boxes shipped and the number of large boxes
shipped. Define the variables that you use to
write the system.