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受欢迎的 Word Problems >

father is now three times as old as his son. Five years back, he was four times as old as his son. The age of the son (in years) is

解答

f a t h er i s n o w t h ree t im es a s o l d a s hi s so n . F i v e ye a rs ba c k, h e w a s f o u r t im es a s o l d a s hi s so n . T h e a g e o f t h e so n (in ye a rs) i s

解答

Son^{'} s age is : 15

Father^{'} s age is : 45

求解步骤

Translate the problem into an equation:

3 x - 5 = 4 (x - 5)

求解

x, 3 x - 5 = 4 (x - 5) : x = 15

找到 age

Son^{'} s age is : 15

Father^{'} s age is : 45

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