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Mathematics 20 Online
OpenStudy (anonymous):

x-6/x+4 - x+9/x-4

OpenStudy (anonymous):

x=-12/23

hero (hero):

I guess you assumed the negative sign meant =

hero (hero):

I don't think we're supposed to solve for x

OpenStudy (lalaly):

\[(\frac{x-6}{x+4} \times \frac{x-4}{x-4}) - (\frac{x+9}{x-4} \times \frac{x+4}{x+4})\]\[=\frac{(x-6)(x-4) - (x+9)(x+4)}{(x-4)(x+4)}\]\[=\frac{x^2-10x+24 - (x^2+13x+36)}{(x+4)(x-4)}\]

OpenStudy (lalaly):

\[=\frac{-23x-12}{(x+4)(x-4)}\]

OpenStudy (anonymous):

That was right. Can I ask you another one?

OpenStudy (lalaly):

mm..ok:)

OpenStudy (anonymous):

x-2/x+8 - x+7/x-8

hero (hero):

I was trying to take a shortcut but it didn't work

OpenStudy (anonymous):

Thanks for trying. I have about 10 I am stumped on.

hero (hero):

This next one you posted you can use the same format Lana used to solve it. The steps are the same.

OpenStudy (anonymous):

I had 100 problems and only 10 really got me stumped.. not bad I guess

hero (hero):

100 is quite a lot

OpenStudy (lalaly):

yeah its the same.. try to do it and check ur answer here,

hero (hero):

lalalalalalalalalalalady Oops sorry. My keyboard got away from me.

OpenStudy (lalaly):

haha lana was ok :D

OpenStudy (anonymous):

-7x+1/(X+4)(x-4)?

OpenStudy (lalaly):

where did the 4 come from? (x-8)(x+8)

OpenStudy (anonymous):

yes but now I see why that doesnt work

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