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Mathematics
OpenStudy (anonymous):

3/7v + 9/v = 1

OpenStudy (pfenn1):

\[\frac{3}{7v}+\frac9v=1\]Do you know what the LCD is?

OpenStudy (pfenn1):

\[\frac{3+9(7)}{7v}=1\]\[3+63=7v\]Solve for v.

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