Mnm is five times as old as my sister.How old is mum now?
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Mnm is five times as old as my sister.How old is mum now?
Mum is five times as old as my sister.In 15 years mun will be twice as old as my sister How old is mum now?
Mum is five times as old as my sister.In 15 years mun will be twice as old as my sister How old is mum now?
Mum is five times as old as my sister.In 15 years mun will be twice as old as my sister How old is mum now?
中文即妈妈是姐姐年龄的5倍,15年后妈妈是姐姐年龄的2倍,求妈妈现在的年龄.
设妈妈现在年龄=A,姐姐现在年龄A/5,
A+15=2*(A/5+15)
得A=25
即Mum is 25 years old now.
中文即妈妈是姐姐年龄的5倍,15年后妈妈是姐姐年龄的2倍,求妈妈现在的年龄.
设妈妈现在年龄=A,姐姐现在年龄A/5,
A+15=2*(A/5+15)
得A=25
即Mum is 25 years old now.
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