91=7(n+4)

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Solution for 91=7(n+4) equation: 



91=7(n+4)

We move all terms to the left:

91-(7(n+4))=0



We calculate terms in parentheses: -(7(n+4)), so:

7(n+4)

We multiply parentheses

7n+28

Back to the equation:

-(7n+28)



We get rid of parentheses

-7n-28+91=0

We add all the numbers together, and all the variables

-7n+63=0

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

-7n=-63

n=-63/-7

n=+9

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