Solve for x
x = \frac{30 \sqrt{6}}{7} \approx 10.497813183
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7x=30\sqrt{6}
Combine 3x and 4x to get 7x.
\frac{7x}{7}=\frac{30\sqrt{6}}{7}
Divide both sides by 7.
x=\frac{30\sqrt{6}}{7}
Dividing by 7 undoes the multiplication by 7.
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