15+12(n-1)=39

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Solution for 15+12(n-1)=39 equation: 



15+12(n-1)=39

We move all terms to the left:

15+12(n-1)-(39)=0

We add all the numbers together, and all the variables

12(n-1)-24=0

We multiply parentheses

12n-12-24=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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