-21+3n=6(4-7n)

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Solution for -21+3n=6(4-7n) equation: 



-21+3n=6(4-7n)

We move all terms to the left:

-21+3n-(6(4-7n))=0

We add all the numbers together, and all the variables

3n-(6(-7n+4))-21=0



We calculate terms in parentheses: -(6(-7n+4)), so:

6(-7n+4)

We multiply parentheses

-42n+24

Back to the equation:

-(-42n+24)



We get rid of parentheses

3n+42n-24-21=0

We add all the numbers together, and all the variables

45n-45=0

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

45n=45

n=45/45

n=1

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