3n+1=n+9

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Solution for 3n+1=n+9 equation: 



3n+1=n+9

We move all terms to the left:

3n+1-(n+9)=0

We get rid of parentheses

3n-n-9+1=0

We add all the numbers together, and all the variables

2n-8=0

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

2n=8

n=8/2

n=4

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