90=3(5n+5)

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Solution for 90=3(5n+5) equation: 



90=3(5n+5)

We move all terms to the left:

90-(3(5n+5))=0



We calculate terms in parentheses: -(3(5n+5)), so:

3(5n+5)

We multiply parentheses

15n+15

Back to the equation:

-(15n+15)



We get rid of parentheses

-15n-15+90=0

We add all the numbers together, and all the variables

-15n+75=0

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

-15n=-75

n=-75/-15

n=+5

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