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受欢迎的 Word Problems >

Jack is 3 times as old as Lacy. 7 years from now the sum of their ages will be 34 . How old are they now?

解答

J a c k i s 3 t im es a s o l d a s L a cy . 7 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 34 . Ho w o l d a re t h ey n o w ?

解答

Lacy^{'} s age is : 5

Jack^{'} s age is : 15

求解步骤

Translate the problem into an equation:

3 x + 7 + x + 7 = 34

求解

x, 3 x + 7 + x + 7 = 34 : x = 5

找到 age

Lacy^{'} s age is : 5

Jack^{'} s age is : 15

流行的例子

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