n/2+n=21

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Solution for n/2+n=21 equation: 



n/2+n=21

We move all terms to the left:

n/2+n-(21)=0

We add all the numbers together, and all the variables

n+n/2-21=0

We multiply all the terms by the denominator


n*2+n-21*2=0

We add all the numbers together, and all the variables

n+n*2-42=0

Wy multiply elements

n+2n-42=0

We add all the numbers together, and all the variables

3n-42=0

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

3n=42

n=42/3

n=14

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