315=7(3-7n)

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Solution for 315=7(3-7n) equation: 



315=7(3-7n)

We move all terms to the left:

315-(7(3-7n))=0

We add all the numbers together, and all the variables

-(7(-7n+3))+315=0



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

7(-7n+3)

We multiply parentheses

-49n+21

Back to the equation:

-(-49n+21)



We get rid of parentheses

49n-21+315=0

We add all the numbers together, and all the variables

49n+294=0

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

49n=-294

n=-294/49

n=-6

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