21/2n=120

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Solution for 21/2n=120 equation: 



21/2n=120

We move all terms to the left:

21/2n-(120)=0



Domain of the equation: 2n!=0

n!=0/2

n!=0

n∈R



We multiply all the terms by the denominator


-120*2n+21=0

Wy multiply elements

-240n+21=0

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

-240n=-21

n=-21/-240

n=7/80

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