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Haven
Senior Member

USA
28 Posts

Posted - 09/25/2008 :  08:46:19  Show Profile  Reply with Quote
The information given is:
x - t equals 2t - x

If x and t are positive numbers that satisfy the equation above, what is the value of x divided by t?

The answer given was 5/4

How was this answer obtained. An explanation would be greatly appreciated.
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skeeter
Advanced Member

USA
5634 Posts

Posted - 09/25/2008 :  11:12:05  Show Profile  Reply with Quote
(x-t) = 2t-x

square both sides ...

x-t = 4t-4tx+x

0 = 5t-4tx

0 = t(5t-4x)

since t>0, 5t = 4x ... 5/4 = x/t
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Haven
Senior Member

USA
28 Posts

Posted - 09/25/2008 :  14:29:45  Show Profile  Reply with Quote
Thanks Again Skeeter.
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