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13-06-2020
Mathematics

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John is n years old. Kim is three years younger than John and Vanessa is half
Kim's age

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13-06-2020

Answer:

John = 9

Kim = 6

Vanessa = 3

Step-by-step explanation:

John = n

Kim = n - 3

Vanessa = 0.5n - 1.5

Add them:

2.5n - 4.5 = 18

2.5n = 22.5

n = 9

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