-7(7n-3)=21-18n

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Solution for -7(7n-3)=21-18n equation: 



-7(7n-3)=21-18n

We move all terms to the left:

-7(7n-3)-(21-18n)=0

We add all the numbers together, and all the variables

-7(7n-3)-(-18n+21)=0

We multiply parentheses

-49n-(-18n+21)+21=0

We get rid of parentheses

-49n+18n-21+21=0

We add all the numbers together, and all the variables

-31n=0

n=0/-31

n=0

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