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人気のある >

Carmen is 9 years older than David. Seven years ago, the sum of their ages was 25. How old are they now?

解

Carmen is 9 years older than David. Seven years ago, the sum of their ages was 25. How old are they now?

解

Carmen^{'} s age is : 24

David^{'} s age is : 15

解答ステップ

Translate the problem into an equation:

x - 7 + x - 9 - 7 = 25

x

を解く

x - 7 + x - 9 - 7 = 25 : x = 24

発見する age

Carmen^{'} s age is : 24

David^{'} s age is : 15

人気の例

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