[x(1-50%)-1600-100]*(1-25%)/500=[x(1-50%)-1820]*(1-25%)/400,

问题描述:

[x(1-50%)-1600-100]*(1-25%)/500=[x(1-50%)-1820]*(1-25%)/400,

[x(1-50%)-1600-100]*(1-25%)/500=[x(1-50%)-1820]*(1-25%)/400[x(1-50%)-1700]/5=[x(1-50%)-1820]/44*(0.5x-1700)=5*(0.5x-1820)2x-6800=2.5x-91002.5x-2x=9100-68000.5x=2300x=4600