1/3n+7=21

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Solution for 1/3n+7=21 equation: 



1/3n+7=21

We move all terms to the left:

1/3n+7-(21)=0



Domain of the equation: 3n!=0

n!=0/3

n!=0

n∈R



We add all the numbers together, and all the variables

1/3n-14=0

We multiply all the terms by the denominator


-14*3n+1=0

Wy multiply elements

-42n+1=0

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

-42n=-1

n=-1/-42

n=1/42

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