Variation Function #2

Level pending

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. (2)If the factory's daily profit has to be higher than 1800 RMB, then how many wokers AT LEAST should they add to process B-kind accessory?

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