2n-n/4=21

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Solution for 2n-n/4=21 equation: 



2n-n/4=21

We move all terms to the left:

2n-n/4-(21)=0

We multiply all the terms by the denominator


2n*4-n-21*4=0

We add all the numbers together, and all the variables

-1n+2n*4-84=0

Wy multiply elements

-1n+8n-84=0

We add all the numbers together, and all the variables

7n-84=0

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

7n=84

n=84/7

n=12

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