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Mathematics
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OpenStudy (anonymous):
x-6/x+4 - x+9/x-4
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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):
\[=\frac{-23x-12}{(x+4)(x-4)}\]
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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.
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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.
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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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