If i had the equation -3y=-2x+8 would i divide the 8 by -3 too?

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.

Is this a polynomial function? i need to know asap

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show