-21-7n=7(3-2n)

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Solution for -21-7n=7(3-2n) equation: 



-21-7n=7(3-2n)

We move all terms to the left:

-21-7n-(7(3-2n))=0

We add all the numbers together, and all the variables

-7n-(7(-2n+3))-21=0



We calculate terms in parentheses: -(7(-2n+3)), so:

7(-2n+3)

We multiply parentheses

-14n+21

Back to the equation:

-(-14n+21)



We get rid of parentheses

-7n+14n-21-21=0

We add all the numbers together, and all the variables

7n-42=0

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

7n=42

n=42/7

n=6

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