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Old 06-13-2007   #1
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Default Easy problem... frustrated!

While trying to determine the inverse of (1) y = (1-2x) / (1+x), replace x with y and vice-versa.

(2) This gives x = (1-2y) / (1+y)

The goal is to isolate y in (2), a simple task... however I seem to have forgotten how to do such simple isolations. This part of the problem was skipped in my solutions manual.

The final answer is y = (1-x) / (2+x)

How would one go about solving for y from the original equation?

Thank you for your time.
Old 06-13-2007   #2
Mr. Hui

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Join Date: Mar 2005
Posts: 10,609


Multiply to both sides

Add and subtract to both sides

Factor out

Divide to both sides
Do Math and you can do Anything!
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Old 06-13-2007   #3
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Ther would be excluded values of
and . There's others if you solve for some, but...
Old 06-14-2007   #4
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Thank you... a little embarrassing how easy it was really

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