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受欢迎的 Word Problems >

Calvin is 8 years older than Justin. In 5 years, Calvin will be twice Justin's age. How old are they today?

解答

C a l v in i s 8 ye a rs o l d er t han J u s t in . I n 5 ye a rs, C a l v in w i ll b e tw i ce J u s t i n^{'} s a g e . Ho w o l d a re t h ey t o d a y ?

解答

Calvin^{'} s age is : 11

Justin^{'} s age is : 3

求解步骤

Translate the problem into an equation:

x + 5 = 2 (x - 8 + 5)

求解

x, x + 5 = 2 (x - 8 + 5) : x = 11

找到 age

Calvin^{'} s age is : 11

Justin^{'} s age is : 3

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