Subject:
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Re: See what you find when you go snooping around...
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Wed, 3 Sep 2003 20:06:08 GMT
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Viewed:
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563 times
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In lugnet.org.ca.rtltoronto, David Koudys wrote:
> In lugnet.org.ca.rtltoronto, David Koudys wrote:
>
> fer example, the last one i did--
>
> Dan (always seems to be) twice as old as Mike
>
> Mike was 5 years younger than Ben
>
> Ben was 10 years younger than Dan
>
> Solve for Ben (as the clue)
>
> Ben = Dan - 10
>
> Dan = Mike x 2
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> Mike = Ben - 5
>
>
> So...
>
> Ben = Dan - 10
> Well, what does Dan =?--substitute...
>
> Ben = (Mike x 2) - 10
> Well, what does Mike =?--substitute
>
> Ben = ((Ben - 5) x 2) -10
>
> Ben = (2Ben + 10) -10
Ben = 2Ben + 10 - 10
Ben - 2Ben = 2Ben - 2Ben + 0
-Ben = 0
Something is wrong here.......
>
> Ben = Dan - 10
>
> Dan = Mike x 2
>
> Mike = Ben - 5
Ben = Dan - 10 (susbstitute for Dan)
Ben = (Mike x 2) - 10 (substitute for Mike)
Ben = 2(Ben - 5) - 10 (solve for ben)
Ben = 2Ben - 10 - 10
Ben - 2Ben = 2Ben - 2Ben - 10 -10
-Ben = -20
Ben = 20
Kevin
>
> Then I ferget my basic algebra...
>
> Grr!!!
>
> Looking at it, the answer was 20 but I have no idea how to get there for high
> school algebra was eons ago...
>
> Dave K
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