- #1

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## Homework Statement

Find inverse of f(x) when f(x) = (2x-5)/(7x+4)

## Homework Equations

none

## The Attempt at a Solution

x=(2y-5)/(7y+4) and then i get stuck trying to rearrange back to y=...

- Thread starter luznyr
- Start date

- #1

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Find inverse of f(x) when f(x) = (2x-5)/(7x+4)

none

x=(2y-5)/(7y+4) and then i get stuck trying to rearrange back to y=...

- #2

Dick

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- #3

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ok that gives x(7y+4) -2y= -5, 7xy+4x-2y=-5, so how do i get it back to y= then genius?

- #4

danago

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- #5

Dick

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So 4x+5=2y-7xy=y(2-7x). Can you solve for y now, genius?

- #6

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haha yep ty

- #7

Dick

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BTW sorry about the 'it's not that hard' crack. If you don't see it, you don't see it.

- #8

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yeah sry bout the genius thing, thanks for the help anyone, much appreciated

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