X800- 10(x-30)=28000, after simplification:-10x? + 1 100x-28000=0
That is to say,
x？ -1 10x+2800=0, after decomposition, (x-40)(x-70)=0, and x=40 or x=70.
According to the fact that the per capita cost should not be lower than that of 500 yuan, (800-500)/ 10=30,
It can be seen that when the number of tour groups exceeds 60, the per capita executive cost of travel agencies is not lower than the standard of 500 yuan, so 70 is not the answer to the question.
Therefore, 40 employees can be arranged to participate in this tour.
Exactly! ! !