甲糖18元/kg,乙糖10元/kg,把甲乙两糖配成12.5元/kg的什锦糖40kg,甲乙两糖各有几kg
问题描述:
甲糖18元/kg,乙糖10元/kg,把甲乙两糖配成12.5元/kg的什锦糖40kg,甲乙两糖各有几kg
答
设甲糖 x kg
18x + 10(40-x) = 12.5*40
x = 12.5 kg ----甲糖
40-12.5 = 27.5 kg ----乙糖