设儿子X,
5.5X-3=5X,
算出来是6
寒假作业妈妈今年是儿子的五倍,爸爸的年龄是儿子的5.5倍,比妈妈大3岁.儿子今年几岁,怎么算
寒假作业妈妈今年是儿子的五倍,爸爸的年龄是儿子的5.5倍,比妈妈大3岁.儿子今年几岁,怎么算
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数学人气：254 ℃时间：2019-11-04 09:53:40
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