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受欢迎的 Word Problems >

John is 4 times as old as Martha. Five years ago, the sum of their ages is 50. Find their present age.

解答

J o hn i s 4 t im es a s o l d a s M a r t ha . F i v e ye a rs a g o, t h e s u m o f t h e i r a g es i s 50. F in d t h e i r p rese n t a g e .

解答

Martha^{'} s age is : 12

John^{'} s age is : 48

求解步骤

Translate the problem into an equation:

4 x - 5 + x - 5 = 50

求解

x, 4 x - 5 + x - 5 = 50 : x = 12

找到 age

Martha^{'} s age is : 12

John^{'} s age is : 48

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