设甲需xkg,则乙需(10-x)kg600x+100(10-x)≥4200x≥32/7甲种原料不少于32/7kg
乙种原料(10-x)kg单位共600x+100(10-x)>4200500x>3200x>32/5
600*X+(10-X)*100≥4200
600x + 100(10 - x) 大于等于 4200
600x+100(10-x)≥4200