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

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



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

We move all terms to the left:

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



We calculate terms in parentheses: -(6(-3n+6)), so:

6(-3n+6)

We multiply parentheses

-18n+36

Back to the equation:

-(-18n+36)



We get rid of parentheses

-3n+18n-36+21=0

We add all the numbers together, and all the variables

15n-15=0

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

15n=15

n=15/15

n=1

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