(3+12)/3n=-4

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Solution for (3+12)/3n=-4 equation: 



(3+12)/3n=-4

We move all terms to the left:

(3+12)/3n-(-4)=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-(-4)=0

We add all the numbers together, and all the variables

15/3n+4=0

We multiply all the terms by the denominator


4*3n+15=0

Wy multiply elements

12n+15=0

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

12n=-15

n=-15/12

n=-1+1/4

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