Question 934598
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solve: Tim is K years old and Jennifer is 4 years younger than Tim. find their average age in 3K year's time, in terms of K.

Ans:
Tim's present age = K
Jennifer's present age = K - 4
In 3K years, Tim's age would be {{{K + 3*K = 4*K}}}
In 3K years, Jennifer's age would be {{{K - 4 + 3*K = 4*K - 4}}}
Their total age would be {{{4*K + 4*K - 4 = 8*K - 4}}}
So, the average age would be {{{(8*K - 4)/2 = 4*K - 2}}}
Ans: {{{highlight(4*K - 2)}}}

Hope you got it :)
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