n-(-21)=40

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Solution for n-(-21)=40 equation: 



n-(-21)=40

We move all terms to the left:

n-(-21)-(40)=0

determiningTheFunctionDomain
n-40-(-21)=0

We add all the numbers together, and all the variables

n-19=0

We move all terms containing n to the left, all other terms to the right

n=19

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