Solve for x
x = \frac{64 \sqrt{21}}{21} \approx 13.965944975
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\sqrt{21}x=64
Swap sides so that all variable terms are on the left hand side.
\frac{\sqrt{21}x}{\sqrt{21}}=\frac{64}{\sqrt{21}}
Divide both sides by \sqrt{21}.
x=\frac{64}{\sqrt{21}}
Dividing by \sqrt{21} undoes the multiplication by \sqrt{21}.
x=\frac{64\sqrt{21}}{21}
Divide 64 by \sqrt{21}.
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