Which bar diagram represents the equation 5x + 7.5 = 15? A bar diagram. The top box contains 5 x. The bottom boxes contain 7.5 a
nd 15. A bar diagram. The top box contains 7.5. The bottom boxes contain 5 x and 15. A bar diagram. The top box contains 15. The bottom boxes contain 5 x and 7.5. A bar diagram. The top box contains 5. The bottom boxes contain 7.5 x and 15.
What you do on one side of the equation, you do to the other. She added 10x on the right side and subtracted 10x on the left when she should have added 10x on both sides.