[6000/(20%*x)+100]*x*10%=8000

问题描述:

[6000/(20%*x)+100]*x*10%=8000

X=500.
[6000/(20%*x)+100]*x*10%=8000
[6000/(0.2x)+100]*0.1x=8000
[30000x+100]*0.1x=8000
3000x2+10x=8000
300x2+x=800
x=500