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OpenStudy (anonymous):
3/7v + 9/v = 1
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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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