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OpenStudy (anonymous):
Solve 5 over x plus 8 equals 3 over x for x and determine if the solution is extraneous or not.
x = 12, non-extraneous
x = 12, extraneous
x = -12, non-extraneous
x = -12, non-extraneous
OpenStudy (anonymous):
i think x = 12 but idk if its extraneous or not
OpenStudy (anonymous):
@timo86m
Nnesha (nnesha):
substitute x value into original question to check if it's an extraneous or not
if both sides are equal then nope
if both sides are not equal then yes it's an extraneous
OpenStudy (anonymous):
can u write it down ?
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OpenStudy (anonymous):
okay @Nnesha and yeah give me a sec @timo86m
OpenStudy (anonymous):
\[\frac{ 5 }{ x + 8 } = \frac{ 3 }{ x }\]
OpenStudy (anonymous):
okay now im gonna plug it in
OpenStudy (anonymous):
and yes they equal each other
OpenStudy (anonymous):
so the answer is x = 12 not extraneous
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Nnesha (nnesha):
yes right
OpenStudy (anonymous):
cross multiply
OpenStudy (anonymous):
i have a few more if you don't mind helping with?
OpenStudy (anonymous):
cross multiply what?
OpenStudy (anonymous):
oh its a technique
Like this
|dw:1433548332138:dw|