90=(3x+18)+27

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Solution for 90=(3x+18)+27 equation: 



90=(3x+18)+27

We move all terms to the left:

90-((3x+18)+27)=0



We calculate terms in parentheses: -((3x+18)+27), so:

(3x+18)+27

We get rid of parentheses

3x+18+27

We add all the numbers together, and all the variables

3x+45

Back to the equation:

-(3x+45)



We get rid of parentheses

-3x-45+90=0

We add all the numbers together, and all the variables

-3x+45=0

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

-3x=-45

x=-45/-3

x=+15

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