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

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



-21+6n=-3n+6(n-7)
We move all terms to the left:
-21+6n-(-3n+6(n-7))=0
We calculate terms in parentheses: -(-3n+6(n-7)), so:
-3n+6(n-7)
We multiply parentheses
-3n+6n-42
We add all the numbers together, and all the variables
3n-42
Back to the equation:
-(3n-42)
We get rid of parentheses
6n-3n+42-21=0
We add all the numbers together, and all the variables
3n+21=0
We move all terms containing n to the left, all other terms to the right
3n=-21
n=-21/3
n=-7

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