Direct and Inverse Variation Function#1

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A factory has 20 workers, everyone process 5 A-kind accessories or 4 B-kind accessories everyday. In those 20 worker, X(a unknow unmber) of them had been asked to process A-kind accessory, the rest of them are asked to process B-kind accessory. They can earn 16RMB from each A-kind accerssory , and 24 RMB from each B-kind accessory. (1)Which of those is the relationship beween the profit y(RMB) and the number of workers x(workers that process A-kind accessory)

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