2(n-9)+n=12

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Solution for 2(n-9)+n=12 equation: 



2(n-9)+n=12

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

n+2n-18-12=0

We add all the numbers together, and all the variables

3n-30=0

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

3n=30

n=30/3

n=10

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