In four years Xiao Hong 's age plus Xiao Li's age will be 39.Five years ago ,xiao Hong was 9 years old .How old is Xiao Li now

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In four years Xiao Hong 's age plus Xiao Li's age will be 39.Five years ago ,xiao Hong was 9 years old .How old is Xiao Li now

In four years Xiao Hong 's age plus Xiao Li's age will be 39.Five years ago ,xiao Hong was 9 years old .How old is Xiao Li now
In four years Xiao Hong 's age plus Xiao Li's age will be 39.Five years ago ,xiao Hong was 9 years old .How old is Xiao Li now

In four years Xiao Hong 's age plus Xiao Li's age will be 39.Five years ago ,xiao Hong was 9 years old .How old is Xiao Li now
小红今年14岁 小李17岁

4年后小红的年龄加上小李的年龄是39,5年前,小红9岁。现在小李几岁?
39-(9+4)-4=22