-9-3(1-7n)=-21

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Solution for -9-3(1-7n)=-21 equation: 



-9-3(1-7n)=-21

We move all terms to the left:

-9-3(1-7n)-(-21)=0

We add all the numbers together, and all the variables

-3(-7n+1)-9-(-21)=0

We add all the numbers together, and all the variables

-3(-7n+1)+12=0

We multiply parentheses

21n-3+12=0

We add all the numbers together, and all the variables

21n+9=0

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

21n=-9

n=-9/21

n=-3/7

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