Paul is 5 years younger than Roman and Jules is 10 years younger _英语解答

Paul is 5 years younger than Roman and Jules is 10 years younger than the sum of Paul's and Roman's age.How old is Roman if the three ages add up to 80 years?
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人气：436 ℃　时间：2020-05-08 06:15:10

解答

设Roman x岁
x+x-5+ x+x-5-10=80
x=25
所以Paul 20,Roman 25,Jules 35.