9/n=12/4

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Solution for 9/n=12/4 equation: 



9/n=12/4

We move all terms to the left:

9/n-(12/4)=0



Domain of the equation: n!=0

n∈R



We add all the numbers together, and all the variables

9/n-3=0

We multiply all the terms by the denominator


-3*n+9=0

We add all the numbers together, and all the variables

-3n+9=0

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

-3n=-9

n=-9/-3

n=+3

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