(30%+20%x)/(1+x)=24%
0.3+0.2x=0.24+0.24x
0.04x=0.06
x=1.5
比例弄反了后:
(30%x+20%)/(1+x)=(0.45+0.2)/(1+1.5)=0.26=26%
配错的糖水浓度是26%.
把20%的糖水和30%的糖水混在一起想配成24%的糖水,可是不小心把比例弄反了,问配错的糖水浓度是百分之几
把20%的糖水和30%的糖水混在一起想配成24%的糖水,可是不小心把比例弄反了,问配错的糖水浓度是百分之几
数学人气:926 ℃时间:2020-05-26 14:28:30
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