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受欢迎的 Word Problems >

jonathan is now three times as old as his son is. twelve years ago he was six times as old as his son was. find their present ages.

解答

j o na t han i s n o w t h ree t im es a s o l d a s hi s so n i s . tw e l v e ye a rs a g o h e w a s s i x t im es a s o l d a s hi s so n w a s . f in d t h e i r p rese n t a g es .

解答

Son^{'} s age is : 20

Jonathan^{'} s age is : 60

求解步骤

Translate the problem into an equation:

3 x - 12 = 6 (x - 12)

求解

x, 3 x - 12 = 6 (x - 12) : x = 20

找到 age

Son^{'} s age is : 20

Jonathan^{'} s age is : 60

流行的例子

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