7n+15=-2(3-7n)

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Solution for 7n+15=-2(3-7n) equation: 



7n+15=-2(3-7n)

We move all terms to the left:

7n+15-(-2(3-7n))=0

We add all the numbers together, and all the variables

7n-(-2(-7n+3))+15=0



We calculate terms in parentheses: -(-2(-7n+3)), so:

-2(-7n+3)

We multiply parentheses

14n-6

Back to the equation:

-(14n-6)



We get rid of parentheses

7n-14n+6+15=0

We add all the numbers together, and all the variables

-7n+21=0

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

-7n=-21

n=-21/-7

n=+3

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