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An electrician charges $80 an hour for weekday repairs and $120 for nights and weekends. Last week, the electrician earned $4800 for 50 hours of work. Which system of equations can be used to find how many hours were worked on weekdays

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To answer this problem, we let x be the number of hours working on weekdays and y be the number of hours working on nights and weekends. The sum of these two variables should be equal to 50. The system of linear equation that would best represent this problem is,
                                           x + y = 50
                                         80x + 120y = 4800

Answer:

 x + y = 50

80x + 120y = 4800

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