Supply and Demand:
Supply equals demand, with each as both a demand and a supply.
A restaurant can supply 60 people or 20 people each meal a day.And these 60 people should not open restaurant to avoid competition. and the restaurant has 10 employees.
Bookstores can provide/satisfy 600 people their reading demand. 10 people employees. then 600 people need to do other businesses to avoid competition.
Time to combine Above 2::; 600 with 600/60=10. so 600 people can contain 10 restaurants, while each with 10 employees. so 600=100+500. If 500 each has 5 employees, 100 businesses need to be provided.
I am not sure about the math details, but I hope that this inspires you to have a different thinking.
供需：
供給等於需求，每個都是需求和供給。
一個餐廳每天可以供應60人或每餐20人。這60人不應該開餐館以避免競爭。 這家餐廳有10名員工。
書店可以提供/滿足600人的閱讀需求。 員工10人。 然後600人需要做其他業務以避免競爭。
時間結合2以上：; 600,600 / 60 = 10。 所以600人可以容納10家餐廳，每家都有10名員工。 所以600 = 100 + 500。 如果500人每人有5名員工，則需要提供100家企業。
我不確定數學細節，但我希望這能激發你有不同的思考。
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