Solve for n
n = \frac{11}{2} = 5\frac{1}{2} = 5.5
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\frac{630}{180}=n-2
Divide both sides by 180.
\frac{7}{2}=n-2
Reduce the fraction \frac{630}{180} to lowest terms by extracting and canceling out 90.
n-2=\frac{7}{2}
Swap sides so that all variable terms are on the left hand side.
n=\frac{7}{2}+2
Add 2 to both sides.
n=\frac{7}{2}+\frac{4}{2}
Convert 2 to fraction \frac{4}{2}.
n=\frac{7+4}{2}
Since \frac{7}{2} and \frac{4}{2} have the same denominator, add them by adding their numerators.
n=\frac{11}{2}
Add 7 and 4 to get 11.
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