甲乙两种盐水,按2:3配置浓度为12%,按3:2配置浓度为10%,问甲种盐水的浓度是()%

问题描述:

甲乙两种盐水,按2:3配置浓度为12%,按3:2配置浓度为10%,问甲种盐水的浓度是()%

设甲为x,乙为y
(2x+3y)/2=12%
(3x+2y)/2=10%
解出来,x=2.4%
y=6.4%