a painting is 3 inches longer than it is wide. it is set in a rectangular border that is 2 inches wider than the painting on each side. if the area of the border is 100in^2 what are the dimensions of the painting?
Here is a problem I worked for Jason that is almost the same. See if this won't do it.
http://www.jiskha.com/display.cgi?id=1164826659