Solve for n
n = \frac{90}{\pi} \approx 28.647889757
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n\pi \times 20=10\times 180
Multiply both sides by 180.
n\pi \times 20=1800
Multiply 10 and 180 to get 1800.
20\pi n=1800
The equation is in standard form.
\frac{20\pi n}{20\pi }=\frac{1800}{20\pi }
Divide both sides by 20\pi .
n=\frac{1800}{20\pi }
Dividing by 20\pi undoes the multiplication by 20\pi .
n=\frac{90}{\pi }
Divide 1800 by 20\pi .
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