Does anyone know answer to this ?

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Find the solution of this system of equation -7x+y=-20 9x-3y=36