Jesse needs a carpet of size 45 square feet to cover her room. If her room is 45 feet long What is the width of her room?
1. We know that the area of a rectangle is length times width, so we can set up an equation to solve for width. 
2. We also know that Jesse's room is 45 feet long, so we can plug that value in for length in our equation. 
3. We can solve the equation for width, and we will find that the width of her room is 1 foot.