2(n-9)=12

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



2(n-9)=12

We move all terms to the left:

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

We multiply parentheses

2n-18-12=0

We add all the numbers together, and all the variables

2n-30=0

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

2n=30

n=30/2

n=15

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