Evaluate
\frac{3\sqrt{3}x}{7}-81
Factor
\frac{3\left(\sqrt{3}x-189\right)}{7}
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\frac{3\sqrt{3}x}{7}-9-72
Express 3\times \frac{\sqrt{3}x}{7} as a single fraction.
\frac{3\sqrt{3}x}{7}-81
Subtract 72 from -9 to get -81.
\frac{3\sqrt{3}x}{7}-\frac{81\times 7}{7}
To add or subtract expressions, expand them to make their denominators the same. Multiply 81 times \frac{7}{7}.
\frac{3\sqrt{3}x-81\times 7}{7}
Since \frac{3\sqrt{3}x}{7} and \frac{81\times 7}{7} have the same denominator, subtract them by subtracting their numerators.
\frac{3\sqrt{3}x-567}{7}
Do the multiplications in 3\sqrt{3}x-81\times 7.
\frac{3\left(\sqrt{3}x-189\right)}{7}
Factor out \frac{3}{7}.
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