A travel agency organizes a group to go to other places, with 30 people as a group, and the unit price is 800 yuan per person. Travel agencies give preferential treatment to groups of more than 30 peo

A travel agency organizes a group to go to other places, with 30 people as a group, and the unit price is 800 yuan per person. Travel agencies give preferential treatment to groups of more than 30 people, that is, every additional tour group. If the number of tour groups exceeds x, there is the following formula: (30+X)*(800- 10*X)=30000. Where 30+X represents the total number of people, 10*X represents how much the unit price per person has dropped, and 800- 10*X represents how much the unit price per person is, and X=20, so the total number of people is 30+20=50. LZ verification, I'm not sure I did it right. I am poor at math. The problem of 555 LZ made me realize that I forgot to solve the equation. X is still one number at a time. I am speechless. . .