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\left(n+6\right)\left(n+1\right)=\left(n+10\right)n
Variable n cannot be equal to any of the values -10,-6 since division by zero is not defined. Multiply both sides of the equation by \left(n+6\right)\left(n+10\right), the least common multiple of n+10,n+6.
n^{2}+7n+6=\left(n+10\right)n
Use the distributive property to multiply n+6 by n+1 and combine like terms.
n^{2}+7n+6=n^{2}+10n
Use the distributive property to multiply n+10 by n.
n^{2}+7n+6-n^{2}=10n
Subtract n^{2} from both sides.
7n+6=10n
Combine n^{2} and -n^{2} to get 0.
7n+6-10n=0
Subtract 10n from both sides.
-3n+6=0
Combine 7n and -10n to get -3n.
-3n=-6
Subtract 6 from both sides. Anything subtracted from zero gives its negation.
n=\frac{-6}{-3}
Divide both sides by -3.
n=2
Divide -6 by -3 to get 2.