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受欢迎的 Word Problems >

amy is twice as old as lucy. three years from now the sum of their ages will be 42. How old is amy

解答

am y i s tw i ce a s o l d a s l u cy . t h ree ye a rs f ro m n o w t h e s u m o f t h e i r a g es w i ll b e 42. Ho w o l d i s am y

解答

Amy^{'} s age is : 24

求解步骤

Translate the problem into an equation:

2 x + 3 + x + 3 = 42

求解

x, 2 x + 3 + x + 3 = 42 : x = 12

找到 Amy's age

: 24

Amy^{'} s age is : 24

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