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Home > CC3 > Chapter 7 > Lesson 7.2.1 > Problem 7-41


  2. Judy has $20 and is saving at a rate of $6 per week. Ida has $172 and is spending at a rate of $4 per week. After how many weeks will each have the same amount of money? Homework Help ✎

    1. Write an equation using x and y for Judy and Ida. What does x represent? What does y represent?

    2. Solve this problem using any method you choose.

The equation for Judy is y = 6x + 20.
In this equation y represents the money she has and x represents the number of weeks that have passed.
Try to write your own equation for Ida.

Try using the Equal Values Method.