Final answer:
To find the width of the rectangle, set up an equation based on the given information and solve for 'w' by dividing both sides of the equation by 5.
Step-by-step explanation:
To find the width of the rectangle, we need to set up an equation based on the given information. Let's let the width be represented by 'w'. We are told that the height of the rectangle is 5 times the width, so the height can be represented by '5w'. We are also given that the height is 45 cm. Setting up the equation, we have: 5w = 45. To find the width, we can solve for 'w' by dividing both sides of the equation by 5: w = 45/5 = 9 cm. Therefore, the width of the rectangle is 9 cm.