45 x 3.50 = 157.50 780 - 157.50 = 622.50 622.50 / 2.50 = 249 Natalie sold 249 cds last year
each cd she sells and $3.50 for each dvd she sells. natalie sold 45 dvds last year. she earned a total of $780 last year selling cds and dvds. ;
Natalie sold 249 CDs last year. We derived this by setting up an equation based on her earnings from CDs and DVDs. The equation was solved to find the number of CDs sold using her total earnings of $780.
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