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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

21n-7n+21+7=0

We add all the numbers together, and all the variables

14n+28=0

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

14n=-28

n=-28/14

n=-2

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