(3+12)/3n=-1

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Solution for (3+12)/3n=-1 equation: 



(3+12)/3n=-1

We move all terms to the left:

(3+12)/3n-(-1)=0



Domain of the equation: 3n!=0

n!=0/3

n!=0

n∈R



We add all the numbers together, and all the variables

15/3n-(-1)=0

We add all the numbers together, and all the variables

15/3n+1=0

We multiply all the terms by the denominator


1*3n+15=0

Wy multiply elements

3n+15=0

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

3n=-15

n=-15/3

n=-5

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