解方程15%X+5%XX(500-X)=500X88%
问题描述:
解方程15%X+5%XX(500-X)=500X88%
答
15%x+5%xX(500-x)=500X88%
15x+5xX(500-x)=500X88
3x+xX(500-x)=100X88
3x+500x-x^2=100X88
x^2-503x+8800=0
x=(503±√217809)/2