Respuesta :
Answer:
9
Step-by-step explanation:
Start by setting up your equation. You take the price for the disc player at $202 and x number of CD's for $13. You then get the equation: 202 + 13x = 319
Then solve it. First subtract 202 from each side to get: 13x = 117
Next divide each side by 13 to get: x = 9