9n+3n=36

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Solution for 9n+3n=36 equation: 



9n+3n=36

We move all terms to the left:

9n+3n-(36)=0

We add all the numbers together, and all the variables

12n-36=0

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

12n=36

n=36/12

n=3

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