-7(3-6n)=42n-21

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Solution for -7(3-6n)=42n-21 equation: 



-7(3-6n)=42n-21

We move all terms to the left:

-7(3-6n)-(42n-21)=0

We add all the numbers together, and all the variables

-7(-6n+3)-(42n-21)=0

We multiply parentheses

42n-(42n-21)-21=0

We get rid of parentheses

42n-42n+21-21=0

We add all the numbers together, and all the variables

=0

n=0/1

n=0

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