0.4=12/n

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Solution for 0.4=12/n equation: 



0.4=12/n

We move all terms to the left:

0.4-(12/n)=0



Domain of the equation: n)!=0

n!=0/1

n!=0

n∈R



We add all the numbers together, and all the variables

-(+12/n)+0.4=0

We get rid of parentheses

-12/n+0.4=0

We multiply all the terms by the denominator


(0.4)*n-12=0

We multiply parentheses

0.4n-12=0

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

0.4n=12

n=12/0.4

n=30

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