Solve for n
n = \frac{21}{2} = 10\frac{1}{2} = 10.5
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-2n=-21
Subtract 21 from both sides. Anything subtracted from zero gives its negation.
n=\frac{-21}{-2}
Divide both sides by -2.
n=\frac{21}{2}
Fraction \frac{-21}{-2} can be simplified to \frac{21}{2} by removing the negative sign from both the numerator and the denominator.
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