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TechWiz Electronics makes a profit of  for each MP3 player sold and  for each DVD player s
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TechWiz Electronics makes a profit of  for each MP3 player sold and  for each DVD player sold. Last week, TechWiz made a
total profit of for MP3 and DVD players combined. Suppose that TechWiz sold DVD players last week. Write an expression
for the number of MP3 players TechWiz sold last week.
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