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受欢迎的 Word Problems >

Jack is twice as old as Lacy. In three years the sum of their ages will be 54.How old are they now?

解答

J a c k i s tw i ce a s o l d a s L a cy . I n t h ree ye a rs t h e s u m o f t h e i r a g es w i ll b e 54. Ho w o l d a re t h ey n o w ?

解答

Lacy^{'} s age is : 16

Jack^{'} s age is : 32

求解步骤

Translate the problem into an equation:

2 x + 3 + x + 3 = 54

求解

x, 2 x + 3 + x + 3 = 54 : x = 16

找到 age

Lacy^{'} s age is : 16

Jack^{'} s age is : 32

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