3(3n+7)=12

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Solution for 3(3n+7)=12 equation: 



3(3n+7)=12

We move all terms to the left:

3(3n+7)-(12)=0

We multiply parentheses

9n+21-12=0

We add all the numbers together, and all the variables

9n+9=0

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

9n=-9

n=-9/9

n=-1

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