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Ben is three times as old as John. The sum of their ages is 40 years. How old is each of them?

解答

Ben is three times as old as John. The sum of their ages is 40 years. How old is each of them?

解答

John^{'} s age is : 10

Ben^{'} s age is : 30

求解步骤

Translate the problem into an equation:

3 x + x = 40

求解

x, 3 x + x = 40 : x = 10

找到 age

John^{'} s age is : 10

Ben^{'} s age is : 30

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