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The sum of the age of two sister is 38. The younger sister was 4 years younger than older ten years ago. How old is the younger |
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Answer» Given: The sum of the AGE of two sister is 38. The YOUNGER sister was 4 years younger than older ten years ago. To Find: How old is the younger? Solution: PRESENT age Let age of younger sister = X years Age of older sister = 38 - X Past age Before 10 years, age of younger and older sister was: Age of younger sister = X - 10 Age of older sister = 38 - X - 10 = 28 - X From given question: The younger sister was 4 years younger than older ten years ago: X-10 = 28 - X - 4 X- 10 = 24 - X X + X = 24 + 10 2X = 34 Means: X = 17 years Present age of younger sister is 17 years. |
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