judy is 10 and her sister is 12 .in how many years will their age_英语解答

judy is 10 and her sister is 12 .in how many years will their ages total 38

人气：454 ℃　时间：2020-05-01 05:12:55

解答

judy 10岁
她姐姐 12岁
几年后他们的年龄和为 38
(38-10-12)/2 = 8
8年后