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math problem

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TTH
 
Reply Tue 18 Mar, 2008 09:18 am
A friend emailed me a math problem. I don't know the answer to this problem and I was wondering if anyone here can solve it.

X = 3-Y
Y = 12/X
Z = 1/X + 1/Y

solve for Z without rounding or truncating any decimals
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Type: Discussion • Score: 1 • Views: 605 • Replies: 2
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raprap
 
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Reply Tue 18 Mar, 2008 09:52 am
[size=7]x=3-y
so
x+y=3

y=12/x
so
xy=12

z=1/x+1/y
completing fractions
z=y/(xy)+x/(xy)=(x+y)/(xy)
& from above
z=3/12=1/4[/size]

Hope this helps

Rap
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TTH
 
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Reply Tue 18 Mar, 2008 10:19 am
Thanks raprap Very Happy
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