7n-(n+5)+2n=21

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Solution for 7n-(n+5)+2n=21 equation: 



7n-(n+5)+2n=21

We move all terms to the left:

7n-(n+5)+2n-(21)=0

We add all the numbers together, and all the variables

9n-(n+5)-21=0

We get rid of parentheses

9n-n-5-21=0

We add all the numbers together, and all the variables

8n-26=0

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

8n=26

n=26/8

n=3+1/4

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