3n+4+3n+6=40

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Solution for 3n+4+3n+6=40 equation: 



3n+4+3n+6=40

We move all terms to the left:

3n+4+3n+6-(40)=0

We add all the numbers together, and all the variables

6n-30=0

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

6n=30

n=30/6

n=5

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