Judy Carter is planning to build a bookcase for her home office. She has only 38 feet of lumber to make the un?

Judy Carter is planning to build a bookcase for her home office. She has only 38 feet of lumber to make the unit. The bookcase is constructed of shelves. She wants the width of the bookcase to be 2.5 times the height. Find the width and the height of the bookcase she needs to construct. Show work please!