Posted by **Ali** on Monday, November 1, 2010 at 10:44am.

How is any equation of the form y= -x + b its own inverse?

- inverse equation -
**Reiny**, Monday, November 1, 2010 at 10:50am
write it as

x + y = b

now recall how you take the inverse.

Isn't your first step simply to switch around the x and y variables?

So what you you get ?

- inverse equation -
**Ali**, Monday, November 1, 2010 at 10:52am
The same equation, just simply switched:

if you have

x+y= b, the inverse is y+x=b, which is the same thing and therefore its own inverse?

Thank you!

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