n=6;2n+9=31

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Solution for n=6;2n+9=31 equation: 



n=62n+9=31

We move all terms to the left:

n-(62n+9)=0

We get rid of parentheses

n-62n-9=0

We add all the numbers together, and all the variables

-61n-9=0

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

-61n=9

n=9/-61

n=-9/61

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