257=9+(n-1)*4

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Solution for 257=9+(n-1)*4 equation: 



257=9+(n-1)*4

We move all terms to the left:

257-(9+(n-1)*4)=0



We calculate terms in parentheses: -(9+(n-1)*4), so:

9+(n-1)*4

determiningTheFunctionDomain
(n-1)*4+9

We multiply parentheses

4n-4+9

We add all the numbers together, and all the variables

4n+5

Back to the equation:

-(4n+5)



We get rid of parentheses

-4n-5+257=0

We add all the numbers together, and all the variables

-4n+252=0

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

-4n=-252

n=-252/-4

n=+63

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