Traditional Culture Encyclopedia - Tourist attractions - In order to attract citizens to organize group tours to Tianshui Bay Scenic Area, Spring and Autumn Travel Agency has introduced the following charging standards: The following charging standards

In order to attract citizens to organize group tours to Tianshui Bay Scenic Area, Spring and Autumn Travel Agency has introduced the following charging standards: The following charging standards

Suppose X people go, obviously X>25, (because if It should be 1000-20(X-25)=1500-20X yuan,

So from the question

(1500-20X)*X=27000,

< p>So -20X^2+1500X-27000=0,

So 2X^2-150X+2700=0,

So (X-30)(2X-90) =0,

So X=30 or X=45,

When X=30, 1500-20X=900>700 meets the meaning of the question;

When X = 45, 1500-20