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One day, Xiao Hong and Xiao Li went shopping. The ratio of money they brought was 9:7. Xiao Hong spent 30 yuan and Xiao Li spent 50 yuan. When they left the mall, the ratio of money they had left was 2:1. How much money did they bring?
Set: two people bring X Yuan in total
9/16x-30=2/3(x-30-50)
9/16x-30=2/3x-160/3
2/3x-9/16x=160/9-30
5/48x=70/3
x=192
Xiao Li and Xiao Hong have 21 yuan in total. Xiao Hong spent half of his money and they have 15 yuan in total. How much did they have
Do you want to know how much each of them has?
Let Xiaohong's original money be x, then Xiaoli's money is (21-x);
x/2+(21-x)=15,
The solution is x = 12
The result is that Xiaohong originally has 12 yuan, Xiaoli originally has 9 yuan. If you don't know, ask me again
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