3n+9=2n+12

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Solution for 3n+9=2n+12 equation: 



3n+9=2n+12

We move all terms to the left:

3n+9-(2n+12)=0

We get rid of parentheses

3n-2n-12+9=0

We add all the numbers together, and all the variables

n-3=0

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

n=3

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