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受欢迎的 Word Problems >

Bob's father is 24 years older than Bob. 12 years ago, Bob's dad was double Bob's age at that time. How old is Bob?

解答

B o b^{'} s f a t h er i s 24 ye a rs o l d er t han B o b . 12 ye a rs a g o, B o b^{'} s d a d w a s d o u b l e B o b^{'} s a g e a t t ha t t im e . Ho w o l d i s B o b ?

解答

Bob^{'} s age is : 36

求解步骤

Translate the problem into an equation:

x - 12 = 2 (x - 24 - 12)

求解

x, x - 12 = 2 (x - 24 - 12) : x = 60

找到 Bob's age

: 36

Bob^{'} s age is : 36

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