Sunday, March 16, 2008

Age Problem 2 Solution

Here's a non-algebraic approach to the problem:

If Bobs current age were 8 then 8 years ago he would be zero, so he has to be older than 8 or at least 9 years now. So assume 9 and 36 -- 8 years ago would make 1 and 28 which is 28 times and not what were looking for.. 10 and 40 ---- 8 years ago would make 2 and 32 which is 16 times not what were looking for... try 11 and 44-- 8 years ago would make 3 and 36-- bingo 12 times- So, Jason is 44 and Bob is 11 years old.

Algebraically we have:

x for Bobs age and

4x for Jason

So 4x = x

But 8 years ago Jason was 12 times older so

4x - 8 = 12(x-8)

4x - 8 = 12x - 96

88 = 8x

x = 11 So Bob is currently 11 years old and Jason is 4(11) or 44 years old.

15 comments:

  1. wow what an age difference
    anyway, thanks for the solution

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  2. Many thanks for the solution...^^.. It really helps me a lot!!!!!!! Thank u Thank u Thank u Thank u Thank u Thank u Thank u

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  3. lani is seven years older than her brother. Write an expression for lani's age 8 years ago.

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  4. lichiee.. anghirap.. :))

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  5. wow! tnx frend ur a big help

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  6. Sometimes i can answer age problems correctly, but most of the time i can't. So this is a very big help for us!! Mahirap kasi eh!! :)

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  7. hindi naka tulong pra sken iba kc ang solutiong kailangan ko.tnx na lng po>>:)

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  8. kakaiba!! nakakahilo to dre! xD

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  9. mas maganda kung gumamit siya ng table ,,, suggestion lng po ...:|

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  10. Blah Blah Blah. That Sucks.

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  11. mas maganda kung table yung ginamit

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  12. Mary Glean B. EscuñaAugust 10, 2012 at 1:13 AM

    Thank you so much for the information that really helps me a lot

    ReplyDelete


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