n+n+4+2n=40

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Solution for n+n+4+2n=40 equation: 



n+n+4+2n=40

We move all terms to the left:

n+n+4+2n-(40)=0

We add all the numbers together, and all the variables

4n-36=0

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

4n=36

n=36/4

n=9

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