1/3(21-n)=2n

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Solution for 1/3(21-n)=2n equation: 



1/3(21-n)=2n

We move all terms to the left:

1/3(21-n)-(2n)=0



Domain of the equation: 3(21-n)!=0

n∈R



We add all the numbers together, and all the variables

1/3(-1n+21)-2n=0

We add all the numbers together, and all the variables

-2n+1/3(-1n+21)=0

We multiply all the terms by the denominator


-2n*3(-1n+21)+1=0

Wy multiply elements

-6n^2(-+1=0

We use the square of the difference formula

-6n^2(-1=0

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