【(60-x)*40%+20%x】*40=【(40-x)*20%+4%】*60

问题描述:

【(60-x)*40%+20%x】*40=【(40-x)*20%+4%】*60

【(60-x)*40%+20%x】*40=【(40-x)*20%+4%】*60
(24-0.4x+0.2x)X40=(8-0.2x+0.04)X60
960-8x=482.4-12x
4x=-477.6
x=-119.4