-90=9(n+4)

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Solution for -90=9(n+4) equation: 



-90=9(n+4)

We move all terms to the left:

-90-(9(n+4))=0



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

9(n+4)

We multiply parentheses

9n+36

Back to the equation:

-(9n+36)



We get rid of parentheses

-9n-36-90=0

We add all the numbers together, and all the variables

-9n-126=0

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

-9n=126

n=126/-9

n=-14

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