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2 votes
​Ken is x years old.

Liam is (x + 4) years old.
Tina is 3x years old.

Write an expression, in terms of x, for the mean of their ages.

1 Answer

3 votes
(X +(x + 4) +3x)/3 = (5x +4)/3

Add the ages together and divide by the number of people to get the mean.
User Richard Henage
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